Countable Nouns That Start with O and End with SE

Explore 16 verified English countable nouns starting with O and ending with SE, including Offense, Overdose, Outhouse, Obverse, Omakase, Oxidase and Ose. Sort these count nouns with singular and plural forms by word length for ESL grammar practice, determiner usage, and plural spelling below, or review singular and plural count rules in our noun grammar guide.

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Starts with OA
1 words
oasthouse
Starts with OB
1 words
obverse
Starts with OF
1 words
offense
Starts with OL
1 words
oligoclase
Starts with OM
1 words
omakase
Starts with ON
1 words
oncomouse
Starts with OR
2 words
orthoclase
oranese
Starts with OS
1 words
ose
Starts with OU
1 words
outhouse
Starts with OV3 words
overdose
overblouse
overpoise
Starts with OX3 words
oxidase
oxygenase
oxidoreductase

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