10-Letter Words Matching ____I____M

There are 21 10-letter words that match ____I____M. 6 are common words, such as CARDIOGRAM and CURRICULUM. A rarer one is SHERIFFDOM. In this set, S is the most frequent open letter (17 words). 6 words contain a doubled letter.

Full list 21

cardiogramcurriculumlesbianismnarcissismpatriotismplagiarismarchiplasmbibliofilmforeignisminitialismruffianismspecialismspeciesismsubkingdomsubminimumutopianismcaddiswormmessianismoverinformpharisaismsheriffdom

About this list

Words
21 (6 common words)
Common example
cardiogram
Rare example
sheriffdom
Doubled letters
6
Ending in S
0
Most frequent letter
S (17)

Questions

How many 10-letter words matching ____i____m are there?

21. 6 of them are common words.

What is a common example?

CARDIOGRAM is among the common words in this set.