12-Letter Words Matching I____F______

There are 18 12-letter words that match I____F______. 6 are common words, such as IMPERFECTION and INDIFFERENCE. A rarer one is INTERFUSIONS. In this set, N is the most frequent open letter (17 words). 8 words contain a doubled letter.

Full list 18

imperfectionindifferenceinsufferableinsufferablyinsufficientinterferenceimperfectiveinconformityinsufflationinterfertileindifferencyinsufflatinginsufflatorsinterfacingsinterfacultyinterfluvialinterfoldinginterfusions

About this list

Words
18 (6 common words)
Common example
imperfection
Rare example
interfusions
Doubled letters
8
Ending in S
3
Most frequent letter
N (17)

Questions

How many 12-letter words matching i____f______ are there?

18. 6 of them are common words.

What is a common example?

IMPERFECTION is among the common words in this set.