Countable Nouns Starting with OP and Containing T

Browse 103 valid English countable nouns starting with OP and containing T, from Operation, Opportunity, Option, Opposition, Opponent, Operator and Optional 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 OPA
2 words
opacity
opacification
Starts with OPE13 words
operation
operator
operative
operetta
operant
opencast
operatorship
operationalist
operativity
operationist
operettist
operosity
operatrix
Starts with OPH24 words
ophthalmologist
ophthalmoscope
ophthalmoscopy
ophiolite
ophthalmist
ophthalmoplegia
ophite
ophiologist
ophthalmometer
ophthalmometry
ophites
ophiophilist
ophthalmoscopist
ophthalmomycosis
ophicalcite
ophthalmodynamometer
ophthalmostatometer
ophthalmodiagnosis
ophthalmothermometer
ophthalmencephalon
ophiolater
ophthalmomyositis
ophthalmoneuritis
ophthalmocarcinoma
Starts with OPI13 words
opiate
opinionator
opinionist
opisthosoma
opisthotonos
opisthobranch
opisthograph
opisometer
opisthography
opisthodomos
opisthopulmonate
opisthobranchiate
opisthocoelian
Starts with OPP12 words
opportunity
opposite
opposition
opponent
opportunist
oppositionist
oppugnant
oppilation
oppilative
oppilant
oppignoration
oppigneration
Starts with OPS4 words
opsonization
opsimath
opsonification
opsiometer
Starts with OPT24 words
option
optional
optimization
optics
optimum
optimist
optic
optimizer
optician
optometrist
optionality
optative
optionee
optant
opter
optime
optocoupler
optimates
optimate
optometer
optophone
opticist
optologist
optomeninx
Starts with OPU
1 words
opuntia

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