9-Letter Words Matching ___M__U__

There are 12 9-letter words that match ___M__U__. 3 are common words, such as ALUMINUMS and FARMHOUSE. A rarer one is THUMBNUTS. 2 words contain a doubled letter.

Full list 12

aluminumsfarmhouseprematurecomminutecommutualglomeruleglomerulivermifugedramaturgflameoutsnonmanualthumbnuts

About this list

Words
12 (3 common words)
Common example
aluminums
Rare example
thumbnuts
Doubled letters
2
Ending in S
3

Questions

How many 9-letter words matching ___m__u__ are there?

12. 3 of them are common words.

What is a common example?

ALUMINUMS is among the common words in this set.