15-Letter Words Matching F____I_________

There are 13 15-letter words that match F____I_________. 5 are common words, such as FACETIOUSNESSES and FAMILIARIZATION. A rarer one is FUTILITARIANISM. In this set, N is the most frequent open letter (13 words). 7 words contain a doubled letter.

Full list 13

facetiousnessesfamiliarizationferociousnessesforesightednessfractiousnessesfructificationsfugaciousnessesfunctionalitiesfanaticalnessesfeloniousnessesfractionalizingfunctionalisticfutilitarianism

About this list

Words
13 (5 common words)
Common example
facetiousnesses
Rare example
futilitarianism
Doubled letters
7
Ending in S
9
Most frequent letter
N (13)

Questions

How many 15-letter words matching f____i_________ are there?

13. 5 of them are common words.

What is a common example?

FACETIOUSNESSES is among the common words in this set.