15-Letter Words Matching __I_____I______

There are 17 15-letter words that match __I_____I______. 6 are common words, such as EXISTENTIALISMS and EXISTENTIALISTS. A rarer one is SPINTHARISCOPES. In this set, N is the most frequent open letter (16 words). 7 words contain a doubled letter.

Full list 17

existentialismsexistentialistsflibbertigibbetleisurelinessesunintentionallyutilitarianismscriminalizationreinvestigationunintelligentlychincherincheescoinvestigatorsoligomerizationorientationallypainterlinessesquintuplicatingreinvestigatingspinthariscopes

About this list

Words
17 (6 common words)
Common example
existentialisms
Rare example
spinthariscopes
Doubled letters
7
Ending in S
8
Most frequent letter
N (16)

Questions

How many 15-letter words matching __i_____i______ are there?

17. 6 of them are common words.

What is a common example?

EXISTENTIALISMS is among the common words in this set.