15-Letter Words Matching ____I____I_____

There are 15 15-letter words that match ____I____I_____. 5 are common words, such as CONFIDENTIALITY and PESSIMISTICALLY. A rarer one is POSTIRRADIATION. 10 words contain a doubled letter.

Full list 15

confidentialitypessimisticallyphysiologicallypredispositionsprehistoricallycharismaticallyfideicommissarygravimetricallynonsignificancecholinergicallymultidisciplinenonbiologicallyoveridentifyingplanimetricallypostirradiation

About this list

Words
15 (5 common words)
Common example
confidentiality
Rare example
postirradiation
Doubled letters
10
Ending in S
1

Questions

How many 15-letter words matching ____i____i_____ are there?

15. 5 of them are common words.

What is a common example?

CONFIDENTIALITY is among the common words in this set.