12-Letter Words Matching _I________M_

There are 15 12-letter words that match _I________M_. 3 are common words, such as BIMETALLISMS and EINSTEINIUMS. A rarer one is PITTOSPORUMS. In this set, S is the most frequent open letter (12 words). 3 words contain a doubled letter.

Full list 15

bimetallismseinsteiniumsvigilantismsbiracialismsdidacticismsdisaccustomsdivisionismsfibrosarcomagingivectomyhighbrowismshistoricismslibertinismsmicroanatomypinealectomypittosporums

About this list

Words
15 (3 common words)
Common example
bimetallisms
Rare example
pittosporums
Doubled letters
3
Ending in S
11
Most frequent letter
S (12)

Questions

How many 12-letter words matching _i________m_ are there?

15. 3 of them are common words.

What is a common example?

BIMETALLISMS is among the common words in this set.