Countable Nouns Starting with OP and Containing R

This list gathers 64 English countable nouns starting with OP and containing R, such as Operation, Opportunity, Operator, Opera, Oppression, Opener and Operative. 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 OPA
1 words
opacifier
Starts with OPE21 words
operation
operator
opera
opener
operative
operetta
operand
operant
operon
operculum
openwork
operagoer
operatorship
opercular
operationalist
operativity
operationist
operettist
operosity
opercule
operatrix
Starts with OPH20 words
ophrys
ophiura
ophiurid
ophthalmometer
ophthalmometry
ophiuroid
ophiuran
ophthalmodynamometer
ophthalmostatometer
ophthalmothermometer
ophiolater
ophthalmoneuritis
ophiomorph
ophidiarium
ophthalmocarcinoma
ophthalmotonometer
ophthalmotropometer
ophthalmodiastimeter
ophthalmorrhexis
ophthalmorrhagia
Starts with OPI7 words
opinionator
opisthobranch
opisthograph
opisometer
opisthography
opisthobranchiate
opificer
Starts with OPO
1 words
oporice
Starts with OPP8 words
opportunity
oppression
oppressor
opportunist
opposer
oppugner
oppignoration
oppigneration
Starts with OPS
1 words
opsiometer
Starts with OPT5 words
optimizer
optometrist
opter
optocoupler
optometer

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