12-Letter Words Matching _N_________M

There are 18 12-letter words that match _N_________M. 1 are common words, such as ANTISEMITISM and ANDROCLINIUM. A rarer one is UNITARIANISM. In this set, I is the most frequent open letter (18 words). 3 words contain a doubled letter.

Full list 18

antisemitismandrocliniumanguilliformantifeminismantihumanismendomorphismincendiarisminflationisminfundibulumintuitionismuniversalismunnilpentiumunnilquadiumanecdotalismanisotropismantiblackismantinepotismunitarianism

About this list

Words
18 (1 common words)
Common example
antisemitism
Rare example
unitarianism
Doubled letters
3
Ending in S
0
Most frequent letter
I (18)

Questions

How many 12-letter words matching _n_________m are there?

18. 1 of them are common words.

What is a common example?

ANTISEMITISM is among the common words in this set.