7-Letter Words Matching ___S__M

There are 15 7-letter words that match ___S__M. 4 are common words, such as BLOSSOM and BOSSISM. A rarer one is OUTSWUM. In this set, U is the most frequent open letter (10 words). 8 words contain a doubled letter.

Full list 15

blossombossismfrustumopossumnauseamalyssumberseemcrissumhassiumbossdomcaesiumdiastemoutswamoutswimoutswum

About this list

Words
15 (4 common words)
Common example
blossom
Rare example
outswum
Doubled letters
8
Ending in S
0
Most frequent letter
U (10)

Questions

How many 7-letter words matching ___s__m are there?

15. 4 of them are common words.

What is a common example?

BLOSSOM is among the common words in this set.