Countable Nouns Starting with OP and Containing NA

This list gathers 10 English countable nouns starting with OP and containing NA, such as Optional, Optionality, Opinionator, Operationalist, Oppugnancy, Opoponax and Oppugnant. 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 OPE
1 words
operationalist
Starts with OPH
1 words
ophthalmodynamometer
Starts with OPI
2 words
opinionator
opisthopulmonate
Starts with OPO
2 words
opoponax
opopanax
Starts with OPP
2 words
oppugnancy
oppugnant
Starts with OPT
2 words
optional
optionality

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