Countable Nouns That Start with OP and End with S

Explore 15 verified English countable nouns starting with OP and ending with S, including Optics, Opus, Ophrys, Opisthotonos, Opponens, Opinicus and Opulus. Sort these count nouns with singular and plural forms by word length for ESL grammar practice, determiner usage, and plural spelling below, or review singular and plural count rules in our noun grammar guide.

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Starts with OPH
7 words
ophrys
ophites
ophthalmomycosis
ophthalmodiagnosis
ophthalmomyositis
ophthalmoneuritis
ophthalmorrhexis
Starts with OPI
3 words
opisthotonos
opinicus
opisthodomos
Starts with OPP
1 words
opponens
Starts with OPT
2 words
optics
optimates
Starts with OPU
2 words
opus
opulus

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