Countable Nouns Starting with O and Containing SO

This list gathers 26 English countable nouns starting with O and containing SO, such as Oppressor, Offseason, Ombudsperson, Outsourcer, Orison, Outsole and Ossobuco. 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 OB4 words
obsessor
obesogen
obsoletion
obsoletism
Starts with OC
1 words
occlusor
Starts with OF
1 words
offseason
Starts with OL
2 words
oloroso
oligopsony
Starts with OM
1 words
ombudsperson
Starts with OP7 words
oppressor
opsonization
opisthosoma
opisometer
opsonification
opsonium
opsomaniac
Starts with OR
2 words
orison
organosol
Starts with OS3 words
ossobuco
ostensorium
ostensory
Starts with OU
2 words
outsourcer
outsole
Starts with OV
1 words
oversolidification
Starts with OX
2 words
oxisol
oxysome

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