11-Letter Words Matching _I_____F___

There are 12 11-letter words that match _I_____F___. 4 are common words, such as DIVERSIFIED and DIVERSIFIES. A rarer one is RIJSTTAFELS. In this set, S is the most frequent open letter (10 words). 4 words contain a doubled letter.

Full list 12

diversifieddiversifieswindsurferswindsurfingdiversiformeisteddfodspitcherfulsairproofingdisbenefitsdiversifiermillionfoldrijsttafels

About this list

Words
12 (4 common words)
Common example
diversified
Rare example
rijsttafels
Doubled letters
4
Ending in S
6
Most frequent letter
S (10)

Questions

How many 11-letter words matching _i_____f___ are there?

12. 4 of them are common words.

What is a common example?

DIVERSIFIED is among the common words in this set.