12-Letter Words Matching __I___M_____

There are 18 12-letter words that match __I___M_____. 5 are common words, such as BOILERMAKERS and EPIGRAMMATIC. A rarer one is TOILSOMENESS. 5 words contain a doubled letter.

Full list 18

boilermakersepigrammaticthingamabobsthingamajigsuniformitiesepistemologyseismometersstichomythiathingumabobsthingumajigstrichomonadstripalmitinsaxisymmetricphillumenistseismometricshittimwoodsstichomythictoilsomeness

About this list

Words
18 (5 common words)
Common example
boilermakers
Rare example
toilsomeness
Doubled letters
5
Ending in S
11

Questions

How many 12-letter words matching __i___m_____ are there?

18. 5 of them are common words.

What is a common example?

BOILERMAKERS is among the common words in this set.