Nouns Ending in SUM and Containing O

Browse 12 valid English nouns ending in SUM and containing O, from Possum, Opossum, Dorsum, Omasum, Callosum, Abomasum and Responsum to rarer terms. Check definitions and spelling below, or visit our noun grammar guide to review pluralization and capitalization rules.

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Starts with A
1 words
abomasum
Starts with C
3 words
callosum
cynoglossum
coeloglossum
Starts with D
1 words
dorsum
Starts with F
1 words
fideicommissum
Starts with O
4 words
opossum
omasum
osteoglossum
odontoglossum
Starts with P
1 words
possum
Starts with R
1 words
responsum

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