Countable Nouns Ending in IUM and Containing OO

Explore 10 verified English countable nouns ending in IUM and containing OO, including Oogonium, Zoosporangium, Zooecium, Zoospermium, Zoogonidium, Zoothecium and Zoocecidium. Browse these count nouns with singular and plural forms below, or review singular and plural count rules in our noun grammar guide.

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Starts with M
1 words
macrozoogonidium
Starts with O
1 words
oogonium
Starts with Z
8 words
zoosporangium
zooecium
zoospermium
zoogonidium
zoothecium
zoocecidium
zoocytium
zoodendrium

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