There are a total of 1360 10-letter words starting with the letter 'o', and the number may vary in different dictionaries. You can specify the dictionary and order.
- operations 14
- objectives 29
- opposition 17
- obligation 17
- originally 17
- occupation 21
- occurrence 21
- occasional 18
- objections 26
- ordinarily 15
- organizing 25
- originated 14
- officially 23
- ordinances 16
- overlooked 20
- oppression 17
- occasioned 18
- ornamental 16
- observance 21
- optimistic 19
- outpatient 15
- obtainable 18
- oscillator 15
- overcoming 23
- observable 21
- oppressive 20
- ordination 13
- organizers 22
- orthogonal 16
- obligatory 18
- obstetrics 16
- offsetting 19
- operatives 17
- ostensibly 17
- overriding 18
- obstructed 18
- outrageous 14
- originates 13
- orthopedic 19
- overruling 19
- overturned 17
- overweight 21
- ophthalmic 24
- orchestral 16
- ornamented 16
- oftentimes 17
- overthrown 20
- originator 13
- occidental 19
- optimizing 28
- overdrafts 18
- orchestras 15
- overloaded 17
- overburden 20
- outweighed 19
- overseeing 17
- overflowed 22
- overstated 15
- omnipotent 18
- overworked 22
- overlapped 22
- ostensible 15
- obliterate 14
- oppressors 16
- outpouring 18
- oxygenated 23
- overhauled 19
- oppositely 19
- optimality 19
- organelles 15
- overcharge 21
- oratorical 14
- overheated 17
- osteopathy 17
- omniscient 18
- overgrowth 21
- overtaking 21
- optionally 18
- oesophagus 18
- outlandish 16
- octahedral 17
- obituaries 14
- obediently 18
- overdosage 17
- overridden 17
- obsessions 14
- overshadow 20
- ophthalmia 21
- orthoclase 16
- optometric 19
- officiated 20
- osmolality 17
- ordinating 12
- ovipositor 17
- orphanages 18
- oversupply 24
- oculomotor 18
- outperform 20
- outfitting 17
- overeating 17
- orientated 12
- organising 16
- overvalued 21
- oscillates 15
- obligating 19
- ownerships 19
- outfitters 14
- overwhelms 23
- obsequious 24
- ostracized 23
- overspread 18
- outgrowths 18
- opalescent 18
- oppressing 19
- omnivorous 19
- orthoptera 15
- osteogenic 16
- obligingly 22
- ochraceous 17
- oceangoing 19
- offensives 21
- organismic 19
- opprobrium 23
- oxidations 19
- outsourced 16
- outgassing 16
- overpriced 21
- oncologist 17
- overlaying 20
- overactive 21
- outfielder 16
- oropharynx 25
- occlusions 19
- overthrust 17
- oscillated 16
- ontologies 14
- octahedron 17
- oligarchic 21
- osteopaths 15
- overstates 14
- overwinter 18
- oxidizable 31
- outputting 18
- osmolarity 16
- orographic 20
- oligoclase 17
- olivaceous 19
- oceanology 19
- overflight 22
- osteoclast 14
- onslaughts 17
- oceanfront 18
- oversights 18
- omeprazole 23
- otherworld 17
- osteoblast 14
- ovariotomy 19
- oleaginous 15
- orchardist 16
- overtopped 21
- oligomeric 19
- orientalia 12
- ordinaries 12
- overgrazed 26
- outriggers 15
- oedematous 15
- offloading 21
- osteopenia 14
- obtuseness 15
- orthotopic 17
- outflanked 21
- outgrowing 19
- overstress 14
- overpasses 17
- orangutans 15
- oxygenates 22
- overthrows 19
- outclassed 16
- ostracodes 14
- overstrain 15
There are 1360 10-letter words starting with the letter o in the well-known word game dictionary, 904 in the Scrabble US (US/Canada/Thailand - TWL/NWL) dictionary, and 1287 in the Scrabble UK (International - SOWPODS/CSW) dictionary, and 939 in the Words with Friends (WWF) dictionary.
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