12-Letter Words Matching ____I_M_____

There are 15 12-letter words that match ____I_M_____. 3 are common words, such as AUTOIMMUNITY and CHARISMATICS. A rarer one is TENSIOMETRIC. In this set, O is the most frequent open letter (13 words). 3 words contain a doubled letter.

Full list 15

autoimmunitycharismaticsconfirmationconfirmatorybibliomaniascardiomegalycraniometersfluviomarinegossipmongerisodiametricmilliamperestensiometersbibliomaniacgradiometerstensiometric

About this list

Words
15 (3 common words)
Common example
autoimmunity
Rare example
tensiometric
Doubled letters
3
Ending in S
6
Most frequent letter
O (13)

Questions

How many 12-letter words matching ____i_m_____ are there?

15. 3 of them are common words.

What is a common example?

AUTOIMMUNITY is among the common words in this set.