Countable Nouns Starting with O and Containing AS

Explore 57 verified English countable nouns starting with O and containing AS, including Occasion, Orgasm, Oasis, Outcast, Offseason, Overcast and Overpass. 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 OA3 words
oasis
oast
oasthouse
Starts with OB
1 words
oblast
Starts with OC8 words
occasion
occasionalism
occasionalist
occasionality
occasioner
octastyle
octastich
octastichon
Starts with OD
1 words
odontoblast
Starts with OF
2 words
offseason
offcast
Starts with OL
2 words
oleaster
oligoclase
Starts with OM
2 words
omakase
omasum
Starts with ON3 words
onomasticon
onomastician
onomast
Starts with OP
2 words
opencast
ophthalmodiastimeter
Starts with OQ
1 words
oquassa
Starts with OR6 words
orgasm
orchardgrass
orthoclase
orgiast
orinasal
orchidocelioplasty
Starts with OS4 words
osteoblast
osteoclast
osteoplasty
osteoclasis
Starts with OT
1 words
otoplasty
Starts with OU8 words
outcast
outcaste
outgassing
outwash
outpass
oubaas
outflash
outlash
Starts with OV10 words
overcast
overpass
overemphasis
overclass
overassessment
overwash
overpersuasion
overprocrastination
overassertion
overmeasure
Starts with OX3 words
oxidase
oxygenase
oxidoreductase

•Browse Countable Nouns by Letter (A to Z)

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