Countable Nouns Starting with O and Containing SM

Explore 31 verified English countable nouns starting with O and containing SM, including Organism, Orgasm, Ombudsman, Osmosis, Ostracism, Orientalism and Oarsman. Browse these count nouns with singular and plural forms below, or review singular and plural count rules in our noun grammar guide.

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Starts with OA
1 words
oarsman
Starts with OB
1 words
obsoletism
Starts with OC3 words
occidentalism
occasionalism
ockerism
Starts with OD
2 words
oddsmaker
oddsman
Starts with OM
1 words
ombudsman
Starts with OR4 words
organism
orgasm
orientalism
orthoprism
Starts with OS16 words
osmosis
ostracism
osmolarity
osmolality
osmanthus
osmund
osmometer
osmophobia
osmate
osmiridium
osmunda
osmole
osmophobic
osmeterium
osmiate
osmerid
Starts with OU
1 words
outdoorsman
Starts with OV
2 words
overassessment
oversman

•Browse Countable Nouns by Letter (A to Z)

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