Countable Nouns Starting with O and Containing MO

This list gathers 48 English countable nouns starting with O and containing MO, such as Osmosis, Oxymoron, Ophthalmologist, Osmolarity, Osmolality, Ophthalmoscope and Oculomotor. Use the sorting controls below to organize entries by length, or consult our noun grammar guide to review singular and plural count rules.

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Starts with OC
2 words
oculomotor
octodecimo
Starts with OK
1 words
okimono
Starts with OM3 words
omophorion
omohyoid
omoplate
Starts with ON
1 words
oncomouse
Starts with OP24 words
ophthalmologist
ophthalmoscope
ophthalmoscopy
ophthalmoplegia
ophthalmometer
ophthalmometry
opisthodomos
ophthalmoscopist
ophthalmomycosis
opisthopulmonate
ophthalmodynamometer
ophthalmostatometer
ophthalmodiagnosis
ophthalmothermometer
ophthalmomyositis
ophthalmoneuritis
ophiomorph
ophthalmocarcinoma
ophthalmotonometer
ophthalmophobia
ophthalmotropometer
ophthalmophyllum
ophthalmodiastimeter
ophthalmomyotomy
Starts with OR
2 words
ornithomimosaur
ornithomorph
Starts with OS8 words
osmosis
osmolarity
osmolality
osmometer
osmophobia
osmole
osmophobic
ostreodynamometer
Starts with OV
2 words
overmodification
overmodernization
Starts with OX
1 words
oxymoron

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