14-Letter Words Matching _I_F__________

There are 12 14-letter words that match _I_F__________. 4 are common words, such as DIFFERENTIATED and DIFFERENTIATES. A rarer one is MISFUNCTIONING. In this set, D is the most frequent open letter (11 words). 8 words contain a doubled letter.

Full list 12

differentiateddifferentiatesdisfigurementsdisfranchisingdifferentiabledifferentiallydifferentiatordiffractometerdieffenbachiasdiffractometrydisfurnishmentmisfunctioning

About this list

Words
12 (4 common words)
Common example
differentiated
Rare example
misfunctioning
Doubled letters
8
Ending in S
3
Most frequent letter
D (11)

Questions

How many 14-letter words matching _i_f__________ are there?

12. 4 of them are common words.

What is a common example?

DIFFERENTIATED is among the common words in this set.