Countable Nouns Starting with OO and Containing OO

Browse 33 valid English countable nouns starting with OO and containing OO, from Ooh, Oops, Ooze, Oof, Oolong, Oop and Oodles 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 OO
1 words
oo
Starts with OOB
1 words
oobit
Starts with OOC
2 words
oocyte
oocyst
Starts with OOD
1 words
oodles
Starts with OOF
1 words
oof
Starts with OOG
2 words
oogonium
oogamete
Starts with OOH
1 words
ooh
Starts with OOJ
1 words
oojamaflip
Starts with OOL
4 words
oolong
oolite
oologist
oolith
Starts with OOM
4 words
oompah
oom
oom-pah-pah
oomycete
Starts with OON
1 words
oont
Starts with OOP
8 words
oops
oop
oophorectomy
oophorosalpingectomy
oophyte
oophoron
oophorhysterectomy
oophorocystectomy
Starts with OOS
3 words
oosphere
oospore
oosperm
Starts with OOT
2 words
ootheca
ootid
Starts with OOZ
1 words
ooze

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