Countable Nouns That Start with OP and End with A

Explore 11 verified English countable nouns starting with OP and ending with A, including Opera, Opa, Operetta, Ophidiophobia, Opuntia, Opisthosoma and Ophthalmoplegia. 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.