Countable Nouns Starting with O and Containing OO

Browse 52 valid English countable nouns starting with O and containing OO, from Ooh, Outlook, Overlook, Oops, Ooze, Oof and Onlooker to rarer terms. Check definitions and spelling below, or visit our noun grammar guide to review singular and plural count rules.

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Starts with OA
1 words
oakwood
Starts with OC
1 words
octoroon
Starts with OF
1 words
offshoot
Starts with ON
1 words
onlooker
Starts with OO24 words
ooh
oops
ooze
oof
oolong
oop
oodles
oo
oocyte
oompah
oom
oom-pah-pah
oocyst
oogonium
oolite
oophorectomy
ootheca
oologist
oont
oosphere
oospore
oojamaflip
oophorosalpingectomy
ootid
Starts with OR
1 words
orrisroot
Starts with OU6 words
outlook
outdoorsman
outshoot
outdoorswoman
outroop
outrooper
Starts with OV7 words
overlook
overshoot
overbooking
overproof
overlooker
overboot
overflood
Starts with OX
1 words
oxblood

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ABCDEFGHIJKLMNOPQRSTUVWXYZ
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