Countable Nouns Starting with O and Containing PO

This list gathers 43 English countable nouns starting with O and containing PO, such as Opportunity, Opposition, Opponent, Outpost, Outpouring, Opportunist and Opossum. Use the sorting controls below to organize entries by length, or consult our noun grammar guide to review singular and plural count rules.

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Starts with OC5 words
octopod
octopoid
occipitoposterior
octopodan
octapody
Starts with OL
2 words
oligopoly
oligopolist
Starts with OM
2 words
omnipotent
omnipotentiality
Starts with ON
2 words
onomatopoeia
onomatopoiesis
Starts with OO
1 words
oospore
Starts with OP18 words
opportunity
opposite
opposition
opponent
opportunist
opossum
opposer
oppo
oppositionist
opponency
opoponax
opponens
opobalsam
ophiopogon
opodeldoc
opopanax
ophthalmotropometer
oporice
Starts with OR
2 words
orthopod
ornithopod
Starts with OU6 words
outpost
outpouring
outpour
outport
outporter
outpourer
Starts with OV5 words
overexposure
oviposition
ovipositor
overpoise
overproportion

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