14-Letter Words Matching _________M_S__

There are 12 14-letter words that match _________M_S__. 2 are common words, such as HIPPOPOTAMUSES and NONCONFORMISTS. A rarer one is THERMOCHEMISTS. 4 words contain a doubled letter.

Full list 12

hippopotamusesnonconformistsexophthalmoseshistoplasmosiselectroosmoseselectroosmosisexophthalmuseshistoplasmosesimmunochemistsnonconformismsphotochromismsthermochemists

About this list

Words
12 (2 common words)
Common example
hippopotamuses
Rare example
thermochemists
Doubled letters
4
Ending in S
12

Questions

How many 14-letter words matching _________m_s__ are there?

12. 2 of them are common words.

What is a common example?

HIPPOPOTAMUSES is among the common words in this set.