14-Letter Words Matching __________N__M

There are 16 14-letter words that match __________N__M. 5 are common words, such as ANTIQUARIANISM and EGALITARIANISM. A rarer one is RESTRICTIONISM. In this set, I is the most frequent open letter (16 words). 2 words contain a doubled letter.

Full list 16

antiquarianismegalitarianismobstructionismservomechanismutilitarianismabstractionismassociationismlibertarianismmillenarianismnondeterminismproletarianismspermatogoniumultramodernismultramontanismchondrocraniumrestrictionism

About this list

Words
16 (5 common words)
Common example
antiquarianism
Rare example
restrictionism
Doubled letters
2
Ending in S
0
Most frequent letter
I (16)

Questions

How many 14-letter words matching __________n__m are there?

16. 5 of them are common words.

What is a common example?

ANTIQUARIANISM is among the common words in this set.