12-Letter Words Matching A__________M

There are 19 12-letter words that match A__________M. 3 are common words, such as ABOLITIONISM and AESTHETICISM. A rarer one is ARCHESPORIUM. In this set, I is the most frequent open letter (19 words). 3 words contain a doubled letter.

Full list 19

abolitionismaestheticismantisemitismaeroembolismallomorphismamphitheciumandrocliniumanguilliformantifeminismantihumanismasynchronismautomorphismanecdotalismanisotropismantiblackismantinepotismapocalyptismappressoriumarchesporium

About this list

Words
19 (3 common words)
Common example
abolitionism
Rare example
archesporium
Doubled letters
3
Ending in S
0
Most frequent letter
I (19)

Questions

How many 12-letter words matching a__________m are there?

19. 3 of them are common words.

What is a common example?

ABOLITIONISM is among the common words in this set.