11-Letter Words Matching I____F_____

There are 18 11-letter words that match I____F_____. 6 are common words, such as IMPERFECTLY and INDIFFERENT. A rarer one is INTERFUSING. In this set, T is the most frequent open letter (18 words). 4 words contain a doubled letter.

Full list 18

imperfectlyindifferentinterfacinginterferinginterferonsinterfilingimperforateinterfacialinterfluentinterfusioninsufflatedinsufflatesinsufflatorinterfamilyinterferersinterfluvesinterfoldedinterfusing

About this list

Words
18 (6 common words)
Common example
imperfectly
Rare example
interfusing
Doubled letters
4
Ending in S
4
Most frequent letter
T (18)

Questions

How many 11-letter words matching i____f_____ are there?

18. 6 of them are common words.

What is a common example?

IMPERFECTLY is among the common words in this set.