Countable Nouns Ending in UM and Containing SS

Explore 18 verified English countable nouns ending in UM and containing SS, including Possum, Opossum, Sargassum, Alyssum, Pessimum, Fideicommissum and Crissum. 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 A
2 words
alyssum
appressorium
Starts with C
5 words
colosseum
crissum
cynoglossum
crassamentum
coeloglossum
Starts with E
1 words
emissarium
Starts with F
1 words
fideicommissum
Starts with G
1 words
grassum
Starts with O
4 words
opossum
ossarium
osteoglossum
odontoglossum
Starts with P
2 words
possum
pessimum
Starts with S
2 words
sargassum
scissorium

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