15-Letter Words Matching _N____________M

There are 13 15-letter words that match _N____________M. 2 are common words, such as INTELLECTUALISM and INTERVENTIONISM. A rarer one is ENTEROBACTERIUM. In this set, I is the most frequent open letter (13 words). 1 words contain a doubled letter.

Full list 13

intellectualisminterventionismanticlericalismanticolonialismentrepreneurisminfundibuliforminstrumentalismanthropopathismantimaterialismantirationalismantiromanticismenantiomorphismenterobacterium

About this list

Words
13 (2 common words)
Common example
intellectualism
Rare example
enterobacterium
Doubled letters
1
Ending in S
0
Most frequent letter
I (13)

Questions

How many 15-letter words matching _n____________m are there?

13. 2 of them are common words.

What is a common example?

INTELLECTUALISM is among the common words in this set.