9-Letter Words Matching ____M_U__

There are 19 9-letter words that match ____M_U__. 6 are common words, such as CHROMIUMS and ENCOMIUMS. A rarer one is REARMOUSE. In this set, O is the most frequent open letter (13 words). 3 words contain a doubled letter.

Full list 19

chromiumsencomiumsloudmouthparamountparamoursrecomputecatamountcharmeusecreamcupsfrogmouthgoalmouthpoormouthreremousesteampunkcreampuffdidymiumsmalemiutsnonimmunerearmouse

About this list

Words
19 (6 common words)
Common example
chromiums
Rare example
rearmouse
Doubled letters
3
Ending in S
6
Most frequent letter
O (13)

Questions

How many 9-letter words matching ____m_u__ are there?

19. 6 of them are common words.

What is a common example?

CHROMIUMS is among the common words in this set.