10-Letter Words Matching _____M_U__

There are 14 10-letter words that match _____M_U__. 4 are common words, such as AUTOIMMUNE and MOTORMOUTH. A rarer one is SMALLMOUTH. In this set, O is the most frequent open letter (12 words). 2 words contain a doubled letter.

Full list 14

autoimmunemotormouthneodymiumstantamountcircumfusescaramouchshrewmousesnakemouthbeglamoursgelsemiumslargemouthmiscomputeprecomputesmallmouth

About this list

Words
14 (4 common words)
Common example
autoimmune
Rare example
smallmouth
Doubled letters
2
Ending in S
3
Most frequent letter
O (12)

Questions

How many 10-letter words matching _____m_u__ are there?

14. 4 of them are common words.

What is a common example?

AUTOIMMUNE is among the common words in this set.