There are a total of 175 10-letter words ending in 'um', and the number may vary in different dictionaries. You can specify the dictionary and order.
- acetabulum 22
- ambulacrum 25
- androecium 19
- antebellum 20
- antepartum 18
- apothecium 22
- argumentum 21
- ascogonium 20
- auditorium 16
- cafetorium 20
- cavernosum 22
- cerebellum 22
- charmonium 23
- cinerarium 18
- cockalorum 25
- colloquium 29
- compendium 25
- consortium 18
- curriculum 23
- delphinium 22
- dysprosium 20
- epicardium 21
- epidendrum 20
- epineurium 19
- epiphyllum 26
- episternum 18
- epithelium 20
- falciparum 24
- filopodium 22
- gadolinium 19
- glochidium 23
- haustellum 19
- haustorium 17
- honorarium 17
- hypanthium 24
- indumentum 21
- involucrum 24
- kettledrum 20
- lawrencium 22
- lebensraum 19
- lobopodium 22
- lycopodium 24
- meerschaum 22
- meitnerium 18
- memorandum 22
- millennium 21
- miracidium 21
- molybdenum 25
- monopodium 22
- monosodium 19
- moratorium 17
- myocardium 23
- myometrium 22
- nasturtium 16
- natatorium 15
- nephridium 21
- nippitatum 21
- oceanarium 18
- ommatidium 21
- opprobrium 23
- orichalcum 23
- osmeterium 17
- osmiridium 18
- pancratium 21
- panjandrum 29
- paramecium 23
- parapodium 21
- perimysium 22
- periosteum 17
- peritoneum 18
- petrolatum 18
- phyllodium 24
- plasmodium 22
- polemonium 22
- postbellum 22
- postpartum 20
- praesidium 18
- precordium 21
- primordium 21
- principium 24
- procambium 26
- promethium 22
- propylaeum 23
- proscenium 21
- prostomium 20
- psalterium 18
- puerperium 21
- quadrivium 29
- referendum 19
- sanatorium 15
- sanitarium 15
- sanitorium 15
- sclerotium 18
- seaborgium 19
- septennium 19
- sequestrum 24
- sestertium 14
- simulacrum 22
- spermatium 20
- spiraculum 22
- spongiosum 20
- sporangium 20
- stomodaeum 18
- stramonium 18
- stumblebum 25
- suboptimum 24
- subsellium 20
- substratum 18
- sudatorium 16
- technetium 20
- tepidarium 18
- triclinium 19
- tropaeolum 18
- vibraculum 26
- vomitorium 21
- anaerobium 14
- capitellum 16
- epicentrum 16
- epicranium 16
- exosporium 21
- hemelytrum 20
- polyparium 19
- presternum 14
- proctodeum 17
- subminimum 18
- acroterium 14
- ammoniacum 18
- anacardium 15
- atracurium 14
- chromidium 20
- coenosteum 14
- compluvium 21
- corniculum 16
- dendrobium 16
- desiderium 14
- digitorium 14
- embothrium 19
- emplastrum 16
- eponychium 22
- eriophorum 17
- eupatorium 14
- euphorbium 19
- fumatorium 17
- gnaphalium 18
- horologium 16
- individuum 17
- iridosmium 15
- lenocinium 14
- nidamentum 15
- panaritium 14
- pentathlum 17
- peridinium 15
- perigonium 15
- postulatum 14
- praeludium 15
- praetorium 14
- prometheum 19
- propagulum 17
- prosternum 14
- seaquarium 21
- simillimum 16
- sparganium 15
- spermarium 16
- stichidium 18
- sulphonium 17
- surrogatum 13
- synandrium 16
- tentaculum 14
- thalictrum 17
- tirocinium 14
- triquetrum 21
- tuberculum 16
- umbraculum 18
- vestibulum 17
- zoothecium 26
There are 175 10-letter words ending in um in the well-known word game dictionary, 107 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 164 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 115 in the Words with Friends (WWF) dictionary.
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