12-Letter Words Matching _I_F________

There are 21 12-letter words that match _I_F________. 9 are common words, such as BIOFEEDBACKS and DIFFERENTIAL. A rarer one is SINFONIETTAS. In this set, N is the most frequent open letter (18 words). 13 words contain a doubled letter.

Full list 21

biofeedbacksdifferentialdifficultiesdiffractionsdisfranchisefitfulnessesmisfeasancessinfulnesseswilfulnessesdifferencingdifferentiaedisforestingairfreighteddiffusionismdiffusionistdisfunctionsdisfurnisheddisfurnishesmisfocussingmisfunctionssinfoniettas

About this list

Words
21 (9 common words)
Common example
biofeedbacks
Rare example
sinfoniettas
Doubled letters
13
Ending in S
11
Most frequent letter
N (18)

Questions

How many 12-letter words matching _i_f________ are there?

21. 9 of them are common words.

What is a common example?

BIOFEEDBACKS is among the common words in this set.