Countable Nouns Starting with O and Containing US

This list gathers 53 English countable nouns starting with O and containing US, such as Octopus, Opus, Ouster, Omnibus, Onus, Obfuscation and Outhouse. 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 OA
1 words
oasthouse
Starts with OB5 words
obfuscation
obtrusion
obtusity
obelus
obliquus
Starts with OC8 words
octopus
occlusion
oculus
occlusive
ocellus
occlusor
octonarius
octopusher
Starts with OM
2 words
omnibus
omusubi
Starts with ON6 words
onus
onrush
oncovirus
oncomouse
oncornavirus
oncus
Starts with OP5 words
opus
opuscule
opusculum
opinicus
opulus
Starts with OR5 words
organophosphorus
ornithorhynchus
orthomyxovirus
orthocousin
orthrosanthus
Starts with OS
1 words
osmanthus
Starts with OT
1 words
otocinclus
Starts with OU7 words
ouster
outhouse
outthrust
outrush
oushak
outgush
outflush
Starts with OV11 words
overplus
overthrust
overtrousers
overarousal
overadjustment
overfocus
overblouse
overflush
overillustration
oversusceptibility
overdust
Starts with OZ
1 words
ozothamnus

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