Countable Nouns That Start with O and End with LUM

Explore 6 verified English countable nouns starting with O and ending with LUM, including Operculum, Osculum, Opusculum, Ornithogalum, Oxypetalum and Ophthalmophyllum. 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 OP3 words
operculum
opusculum
ophthalmophyllum
Starts with OR
1 words
ornithogalum
Starts with OS
1 words
osculum
Starts with OX
1 words
oxypetalum

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