Countable Nouns That Start with POS and End with UM

Explore 5 verified English countable nouns starting with POS and ending with UM, including Possum, Positronium, Postulatum, Postliminium and Postscenium. 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 POSI
1 words
positronium
Starts with POSS
1 words
possum
Starts with POST3 words
postulatum
postliminium
postscenium

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