Countable Nouns Ending in SUM and Containing S

This list gathers 28 English countable nouns ending in SUM and containing S, such as Sum, Possum, Opossum, Checksum, Sargassum, Alyssum and Dorsum. Use the sorting controls below to organize entries by length, or consult our noun grammar guide to review singular and plural count rules.

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Starts with A
3 words
alyssum
adsum
abomasum
Starts with C
7 words
checksum
callosum
cusum
clausum
crissum
cynoglossum
coeloglossum
Starts with D
2 words
dorsum
dimensum
Starts with E
2 words
expansum
extensum
Starts with F
2 words
fideicommissum
falsum
Starts with G
1 words
grassum
Starts with H
1 words
helichrysum
Starts with O
4 words
opossum
omasum
osteoglossum
odontoglossum
Starts with P
2 words
possum
pensum
Starts with R
1 words
responsum
Starts with S
3 words
sum
sargassum
sensum

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