Countable Nouns Starting with O and Containing CT

Explore 99 verified English countable nouns starting with O and containing CT, including Object, Objective, Objection, Obstruction, Octopus, Octave and Overreaction. 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 OB13 words
object
objective
objection
obstruction
objector
objectification
obstructionist
objectivist
obstructor
objectivation
objectivization
obduction
obstriction
Starts with OC24 words
octopus
octave
octagon
octane
octet
octogenarian
octavo
octahedron
octuple
octant
octuplet
octothorp
octillion
octocopter
octothorpe
octyl
octoroon
octanol
octennial
octopod
octosyllabic
octahedrite
octopoid
octroi
Starts with OL6 words
olfactory
olfact
olfactologist
olfactometer
olfactophobia
oleorefractometer
Starts with OO4 words
oophorectomy
oophorosalpingectomy
oophorhysterectomy
oophorocystectomy
Starts with OR3 words
orchiectomy
orchidectomy
orthonectid
Starts with OV16 words
overreaction
overcorrection
overproduction
overactivity
oviduct
overprediction
ovariectomy
overaction
overstructure
ovariohysterectomy
overextraction
overabstraction
overintellectualization
overexpectation
overobjectification
ovariosalpingectomy
Starts with OX
1 words
oxidoreductase

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