There are a total of 926 10-letter words containing 'um', and the number may vary in different dictionaries. You can specify the dictionary and order.
- accumulate 22
- acetabulum 22
- adumbrated 19
- adumbrates 18
- albuminoid 20
- albuminous 20
- altocumuli 20
- aluminates 16
- aluminised 17
- aluminises 16
- aluminiums 20
- aluminized 26
- aluminizes 25
- ambulacrum 25
- americiums 20
- androecium 19
- antebellum 20
- antepartum 18
- anthuriums 18
- antiserums 15
- antitumour 16
- apothecium 22
- arboretums 17
- argumentum 21
- ascogonium 20
- asphaltums 20
- assumpsits 17
- assumption 18
- assumptive 21
- athenaeums 17
- atraumatic 17
- auditorium 16
- autumnally 20
- barotrauma 17
- bejumbling 33
- berkeliums 22
- berylliums 21
- bethumping 25
- bituminise 18
- bituminize 27
- bituminous 19
- botulinums 20
- breadcrumb 24
- brummagems 25
- bubblegums 27
- buckjumped 38
- buckjumper 37
- bumblebees 24
- bumblingly 27
- bumiputera 21
- bumiputras 21
- bumpkinish 27
- cafetorium 20
- callithump 24
- calumniate 19
- calumnious 20
- calumnying 24
- castoreums 17
- catechumen 23
- cavernosum 22
- cerastiums 17
- cerebellum 22
- ceruminous 19
- chalumeaux 28
- charmonium 23
- chumminess 23
- cinerarium 18
- circumcise 23
- circumflex 31
- circumfuse 24
- circumvent 25
- clumsiness 19
- coassuming 20
- cockalorum 25
- colchicums 26
- collegiums 21
- colloquium 29
- colluviums 24
- collyriums 21
- colosseums 18
- colostrums 18
- columbaria 21
- columbines 22
- columbites 21
- columbiums 25
- columellae 20
- columellar 20
- columnated 20
- columnists 19
- compendium 25
- consortium 18
- consumable 22
- consumedly 22
- consummate 21
- continuums 20
- conundrums 21
- costumiers 17
- criteriums 17
- crumbiness 21
- crumbliest 21
- crumblings 24
- crumminess 21
- crumpliest 21
- cumberbund 26
- cumbersome 23
- cumbrously 24
- cummerbund 26
- cumulating 22
- cumulation 20
- cumulative 23
- cumuliform 25
- curriculum 23
- cymbidiums 26
- decenniums 20
- dehumanise 18
- dehumanize 27
- dehumidify 23
- delphinium 22
- detumesced 19
- detumesces 18
- deuteriums 16
- diazoniums 25
- dicoumarin 19
- dicoumarol 19
- dicumarols 19
- displuming 22
- documental 20
- documented 20
- documenter 19
- doronicums 19
- drumbeater 18
- drumfishes 20
- drumsticks 22
- dumbeddown 24
- dumbfounds 24
- dumbnesses 19
- dumbphones 24
- dumbsizing 30
- dumbstruck 26
- dumbwaiter 21
- dumfounded 22
- dumptrucks 26
- duralumins 18
- duumvirate 20
- dysprosium 20
- ecumenical 22
- ecumenisms 21
- ecumenists 18
- effluviums 26
- emoluments 19
- encumbered 22
- energumens 18
- enumerable 19
- enumerated 16
- enumerates 15
- enumerator 15
- epicardium 21
- epidendrum 20
- epimediums 21
- epineurium 19
- epiphyllum 26
- episternum 18
- epithelium 20
- equisetums 24
- euphoniums 21
- exhumation 24
- falciparum 24
- fastigiums 19
- filopodium 22
- flagellums 22
- flummeries 21
- flummoxing 31
- fraenulums 20
- frumenties 18
- frumpiness 21
- frumpishly 25
- fumatories 17
- fumblingly 27
- fumigating 22
- fumigation 20
- fumigators 19
- fumitories 17
- gadolinium 19
- galumphing 25
- gelsemiums 20
- germaniums 20
- glochidium 23
- glumnesses 18
- goosebumps 22
- grumblings 23
- grumpiness 20
- grumpishly 24
- gumshields 20
- gumshoeing 21
- gymnasiums 22
- harmoniums 20
- harrumphed 22
- harumphing 24
- haustellum 19
- haustorium 17
- heffalumps 26
- hegumenies 19
- herbariums 19
- honorarium 17
- hoodlumish 20
- hoodlumism 21
- humanbeing 23
- humaneness 18
- humanising 20
- humanistic 20
- humanities 17
- humanizers 26
- humanizing 29
- humblebrag 25
- humbleness 21
- humblingly 26
- humbuggery 26
- humbugging 27
- humdingers 20
- humectants 20
- humidified 21
- humidifier 20
- humidifies 20
- humidistat 17
- humidities 17
- humiliated 18
- humiliates 17
- humiliator 17
- humilities 17
- hummocking 29
- humoresque 26
- humoristic 19
- humorously 20
- humourless 18
- humpbacked 30
- hydroniums 20
- hypanthium 24
- hypericums 24
- ichneumons 21
- illuminant 18
- illuminate 17
- illuminati 17
- illumining 20
- illuminism 20
- illuminist 17
- imposthume 22
- impostumes 20
- incumbency 27
- incumbents 22
- incumbered 22
- indecorums 19
- indumentum 21
- infrahuman 21
- inhumanely 21
- inhumanity 20
- inhumation 18
- innumeracy 21
- innumerate 16
- innumerous 17
- instrument 16
- integument 18
- intichiuma 20
- intumesced 19
- intumesces 18
- involucrum 24
- jumboising 29
- jumboizing 38
- jumproping 32
- jumpstarts 26
- kettledrum 20
- krummhorns 24
- lanthanums 19
- lawrencium 22
- lebensraum 19
- leguminous 19
- ligustrums 18
- linoleumed 18
- lobopodium 22
- lumberjack 34
- lumbersome 21
- lumberyard 21
- luminaires 16
- luminances 20
- luminarias 16
- luminaries 16
- luminesced 20
- luminesces 19
- luminosity 18
- luminously 20
- lumpectomy 26
- lumpfishes 23
- lumpsucker 26
- lycopodium 24
- magnesiums 20
- manubriums 22
- manumitted 19
- manumitter 18
- maumetries 17
- mausoleums 19
- mediumship 23
- mediumwave 25
- meerschaum 22
- meitnerium 18
- memorandum 22
- menstruums 19
- midsummers 21
- millennium 21
- miracidium 21
- misnumbers 21
- molybdenum 25
- monopodium 22
- monosodium 19
- monumental 20
- moratorium 17
- mumblecore 24
- mumblingly 27
- mumbojumbo 36
- mummichogs 27
- mummifying 28
- mumpreneur 22
- myocardium 23
- myometrium 22
- nasturtium 16
- natatorium 15
- naumachiae 20
- naumachias 20
- naumachies 20
- neodymiums 21
- nephridium 21
- neptuniums 20
- neurohumor 18
- nippitatum 21
- nitroniums 16
- nonlegumes 19
- numberable 22
- numberless 19
- numbfishes 23
- numbnesses 19
- numbskulls 25
- numeracies 18
- numeraires 15
- numerating 18
- numeration 16
- numerators 15
- numerology 20
- numerously 19
- numinosity 18
- numinouses 17
- numismatic 21
- nummulites 20
- oceanarium 18
- ommatidium 21
- operculums 22
- opprobrium 23
- orichalcum 23
- osmeterium 17
- osmiridium 18
- outfumbled 23
- outfumbles 22
- outhumored 18
- outjumping 30
- outnumbers 19
- outtrumped 19
- ovalbumins 23
- overpumped 25
- overtrumps 21
- palladiums 20
- pancratium 21
- panjandrum 29
- paramecium 23
- paramylums 23
- parapodium 21
- parfumerie 20
- parfumiers 20
- perimysium 22
- periosteum 17
- peritoneum 18
- petrolatum 18
- petroleums 18
- phillumeny 24
- phyllodium 24
- plasmodium 22
- plumberies 21
- plumblines 23
- plummeting 24
- plumpening 25
- plutoniums 20
- pneumatics 21
- pneumonias 19
- polemonium 22
- polygonums 23
- pomatuming 23
- postbellum 22
- posthumous 20
- postpartum 20
- potassiums 17
- practicums 23
- praesidium 18
- precordium 21
- prenumbers 21
- presidiums 18
- presumable 21
- presumably 23
- presumedly 21
- primordium 21
- principium 24
- procambium 26
- procumbent 24
- promethium 22
- propylaeum 23
- proscenium 21
- prostomium 20
- protohuman 20
- psalterium 18
- pterygiums 21
- puerperium 21
- pummelling 25
- pyrethrums 21
- quadrivium 29
- quadrumvir 29
- reargument 17
- reassuming 17
- recumbency 26
- recumbents 21
- referendum 19
- rehumanize 26
- relumining 19
- renumbered 19
- replumbing 24
- resummoned 19
- resumption 18
- resumptive 21
- rheumatics 19
- rheumatism 19
- rheumatoid 17
- rostellums 16
- ruminantly 19
- ruminating 18
- rumination 16
- ruminative 19
- ruminators 15
- rumpsprung 24
- rumrunners 17
- rutheniums 18
- salumerias 15
- sanatorium 15
- sanitarium 15
- sanitorium 15
- sargassums 16
- schlumpier 23
- schlumping 26
- schtumming 25
- sclerotium 18
- screendump 22
- scrummaged 23
- scrummager 22
- scrummages 22
- scrummiest 20
- scrumpling 24
- seaborgium 19
- sensoriums 15
- septennium 19
- sequestrum 24
- sestertium 14
- sexenniums 23
- showjumped 32
- showjumper 31
- simulacrum 22
- slumberers 18
- slumbering 21
- slumberous 19
- slumminess 19
- slummocked 26
- speedbumps 24
- spermatium 20
- spiraculum 22
- spodumenes 19
- spongiosum 20
- sporangium 20
- stomodaeum 18
- stomodeums 18
- stramonium 18
- strontiums 15
- stumblebum 25
- stumpiness 18
- suboptimum 24
- subsellium 20
- substratum 18
- subsumable 22
- succumbing 27
- sudatorium 16
- sugarplums 21
- sulfoniums 20
- summarised 18
- summariser 17
- summarises 17
- summarists 17
- summarized 27
- summarizer 26
- summarizes 26
- summations 18
- summeriest 17
- summerless 18
- summerlike 22
- summerlong 21
- summertime 20
- summerwood 21
- summiteers 17
- summitries 17
- summonable 22
- summonsing 21
- superhuman 21
- superjumbo 30
- symposiums 22
- synsacrums 20
- technetium 20
- tegumental 18
- telluriums 17
- tenaculums 20
- tepidarium 18
- terrariums 14
- thrummiest 19
- thumbholes 22
- thumbnails 21
- thumbprint 23
- thumbscrew 25
- thumbstick 26
- thumbtacks 26
- thumbwheel 25
- thumpingly 25
- trapeziums 26
- traumatise 14
- traumatism 17
- traumatize 23
- triclinium 19
- trienniums 16
- trifoliums 18
- triumphant 20
- triumphing 22
- triumviral 19
- tropaeolum 18
- trumperies 17
- trumpeters 17
- trumpeting 20
- tumblebugs 24
- tumbledown 23
- tumblehome 23
- tumblerful 23
- tumbleweed 22
- tumescence 21
- tumidities 15
- tumultuary 19
- tumultuous 18
- ultimatums 19
- ultrahuman 19
- umbellifer 22
- umbilicals 22
- umbilicate 21
- umbrageous 20
- umbrellaed 20
- unassuming 19
- unconsumed 21
- uncrumpled 24
- uncrumples 23
- unhumorous 19
- unnumbered 21
- unperfumed 23
- unsummoned 21
- uropygiums 22
- vademecums 25
- verbascums 24
- vibraculum 26
- volumeters 19
- volumetric 22
- voluminous 21
- volumisers 19
- volumising 22
- volumizers 28
- volumizing 31
- vomitorium 21
- wampumpeag 28
- wavenumber 25
- ytterbiums 19
- zirconiums 27
- acuminated 15
- acuminates 14
- alumstones 12
- anaerobium 14
- antitumors 12
- bumfuzzled 36
- bumfuzzles 35
- cacuminals 16
- calvariums 17
- capitellum 16
- carboniums 16
- chalumeaus 17
- conalbumin 16
- coumarones 14
- cumbrances 18
- dentaliums 13
- despumated 16
- despumates 15
- ecomuseums 16
- elateriums 12
- epicentrum 16
- epicranium 16
- exonumists 19
- exosporium 21
- filoplumes 17
- grumbliest 15
- grummeting 16
- hedysarums 19
- hemelytrum 20
- humanhoods 19
- humblebees 19
- humbuggers 19
- inhumanest 15
- jumpmaster 23
- longjumped 23
- lumberings 15
- lumbricals 16
- mummerings 17
- museumgoer 15
- nelumbiums 16
- numbnutses 14
- pastoriums 14
- polyparium 19
- presternum 14
- presummits 16
- proctodeum 17
- pumphouses 19
- reticulums 14
- sacrariums 14
- subminimum 18
- subphylums 22
- sumbitches 19
- summersets 14
- tumblesets 14
- umbellules 14
- unununiums 12
- urediniums 13
- accumbency 23
- achaeniums 17
- acroterium 14
- albumblatt 16
- albumenise 14
- albumenize 23
- albuminate 14
- albuminise 14
- albuminize 23
- ammoniacum 18
- anacardium 15
- arbitriums 14
- aspleniums 14
- assumingly 16
- atracurium 14
- autojumble 21
- avisandums 16
- avizandums 25
- barathrums 17
- beflumming 20
- benumbment 18
- bethumbing 20
- bituminate 14
- bressummer 16
- bumbailiff 22
- bumbledoms 19
- bumfreezer 26
- bummalotis 16
- bumsuckers 20
- bumsucking 21
- cacuminous 16
- cassumunar 14
- castellums 14
- catacumbal 18
- caumstones 14
- centumviri 17
- chromidium 20
- circumduce 19
- circumduct 19
- circummure 18
- circumpose 18
- clumpiness 16
- coenosteum 14
- collodiums 15
- columbates 16
- combretums 18
- compluvium 21
- consumings 15
- corniculum 16
- coumarilic 16
- crumbcloth 21
- crumplings 17
- cucumiform 21
- cumberless 16
- cumberment 18
- cumulately 17
- curcumines 16
- decumbence 19
- decumbency 22
- deliquiums 22
- dendrobium 16
- desiderium 14
- desmodiums 16
- diachylums 21
- diacodiums 16
- diatretums 13
- digitorium 14
- discumbers 17
- dishumours 16
- disinhumed 17
- disinhumes 16
- drepaniums 15
- drumbledor 16
- dumbledore 16
- dumfounder 17
- dummelhead 19
- dumosities 13
- ectropiums 16
- embothrium 19
- emplastrum 16
- emplectums 18
- encolpiums 16
- engouments 13
- enlumining 13
- enrheuming 16
- entropiums 14
- epilobiums 16
- eponychium 22
- eriophorum 17
- eumelanins 12
- eupatorium 14
- euphorbium 19
- excambiums 25
- exhumating 23
- flabellums 17
- fumatorium 17
- fumigatory 19
- fumosities 15
- gallumphed 19
- galumphers 18
- gastraeums 13
- gluciniums 15
- glumaceous 15
- gnaphalium 18
- grumnesses 13
- gumsuckers 19
- gynaeceums 18
- helvetiums 18
- hieraciums 17
- horologium 16
- humanisers 15
- humankinds 20
- humblesses 17
- humbuckers 23
- humdudgeon 18
- humectated 18
- humectates 17
- humectives 20
- humgruffin 22
- humicolous 17
- hummellers 17
- hummelling 18
- humoralism 17
- humoralist 15
- humoursome 17
- illuminato 12
- illuminers 12
- impostumed 17
- individuum 17
- inhumating 16
- inumbrated 15
- inumbrates 14
- iridosmium 15
- jiggumbobs 25
- jumblingly 25
- jumhouriya 25
- kumarahous 19
- kummerbund 21
- lenocinium 14
- lumbricoid 17
- luminarism 14
- luminarist 12
- lumination 12
- lumisterol 12
- magnaliums 15
- marsupiums 16
- micropumps 20
- monumented 15
- mugwumpery 23
- mugwumpish 23
- mugwumpism 22
- mumblement 18
- mumchances 21
- nickumpoop 22
- nidamentum 15
- noumenally 15
- numberings 15
- numerative 15
- numerosity 15
- nummulated 15
- nummulitic 16
- numskulled 17
- nymphaeums 22
- obumbrated 17
- obumbrates 16
- outsumming 15
- overjumped 25
- panaritium 14
- pentathlum 17
- penumbrous 16
- perfumiers 17
- peridinium 15
- perigonium 15
- perinaeums 14
- plumassier 14
- pneumogram 17
- pneumonics 16
- pomoeriums 16
- postulatum 14
- praeludium 15
- praetorium 14
- preconsume 16
- prometheum 19
- prooemiums 16
- propagulum 17
- propodeums 17
- prosternum 14
- pumicating 17
- purdoniums 15
- quadrumane 22
- quadrumans 22
- quaesitums 21
- quercetums 23
- recumbence 18
- rehumanise 15
- reillumine 12
- reilluming 13
- responsums 14
- restumping 15
- rheumatise 15
- rheumatize 24
- rhipidiums 18
- rhumbatron 17
- rumblingly 18
- rumbullion 14
- rumfustian 15
- saccharums 19
- sagapenums 15
- salicetums 14
- scrumdowns 18
- scrumpoxes 23
- scumbering 17
- scumblings 17
- scumfished 21
- scumfishes 20
- seaquarium 21
- semiplumes 16
- separatums 14
- simillimum 16
- skummering 19
- slumberful 17
- sparganium 15
- spermarium 16
- spumescent 16
- stichidium 18
- strumpeted 15
- stumbliest 14
- stumpworks 21
- succumbers 18
- sulphonium 17
- summerings 15
- summertide 15
- summitless 14
- surrogatum 13
- synandrium 16
- taraxacums 21
- tentaculum 14
- tentoriums 12
- thalictrum 17
- thaumasite 15
- thaumatins 15
- thingumbob 20
- thrummings 18
- thumbikins 21
- thumblings 18
- thumbpiece 21
- thumbstall 17
- tirocinium 14
- tormentums 14
- toxalbumin 21
- transhumed 16
- transhumes 15
- transuming 13
- transumpts 14
- tripudiums 15
- triquetrum 21
- triumphals 17
- triumphers 17
- triumphery 20
- tuberculum 16
- tumatakuru 16
- tumorgenic 15
- tumulosity 15
- tumultuate 12
- umbellated 15
- umbiliform 19
- umbonation 14
- umbraculum 18
- umbratical 16
- umbrelloes 14
- umpireship 19
- umpteenths 17
- uncumbered 17
- undertrump 15
- unhumanise 15
- unhumanize 24
- unplumbing 17
- unsummered 15
- vacciniums 19
- vestibulum 17
- virginiums 16
- viticetums 17
- zoothecium 26
- zumbooruks 27
- zygantrums 25
There are 926 10-letter words containing um in the well-known word game dictionary, 544 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 854 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 584 in the Words with Friends (WWF) dictionary.
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