11-Letter Words Matching _____S___M_

There are 13 11-letter words that match _____S___M_. 5 are common words, such as ANGIOSPERMS and BRAINSTORMS. A rarer one is SEQUESTRUMS. In this set, R is the most frequent open letter (12 words). 3 words contain a doubled letter.

Full list 13

angiospermsbrainstormsenthusiasmsgymnospermsnarcissismsgymnospermymicroseismsagamospermycaddiswormsharvesttimelebensraumspharisaismssequestrums

About this list

Words
13 (5 common words)
Common example
angiosperms
Rare example
sequestrums
Doubled letters
3
Ending in S
10
Most frequent letter
R (12)

Questions

How many 11-letter words matching _____s___m_ are there?

13. 5 of them are common words.

What is a common example?

ANGIOSPERMS is among the common words in this set.