9-Letter Words Matching _S_____M_

There are 12 9-letter words that match _S_____M_. 4 are common words, such as ASPARTAME and ASTRONOMY. A rarer one is PSYLLIUMS. In this set, E is the most frequent open letter (9 words). 1 words contain a doubled letter.

Full list 12

aspartameastronomyescapismsisothermsasterismsastrodomeosteotomeosteotomyisarithmsisocheimsisoenzymepsylliums

About this list

Words
12 (4 common words)
Common example
aspartame
Rare example
psylliums
Doubled letters
1
Ending in S
6
Most frequent letter
E (9)

Questions

How many 9-letter words matching _s_____m_ are there?

12. 4 of them are common words.

What is a common example?

ASPARTAME is among the common words in this set.