13-Letter Words Matching __F_____T____

There are 12 13-letter words that match __F_____T____. 6 are common words, such as DIFFERENTIALS and DIFFERENTIATE. A rarer one is REFOUNDATIONS. 7 words contain a doubled letter.

Full list 12

differentialsdifferentiateinfiltrationsinflammationsunforgettableunforgettablydifferentnesseffectuationssoftheartedlydeflagrationsinfibulationsrefoundations

About this list

Words
12 (6 common words)
Common example
differentials
Rare example
refoundations
Doubled letters
7
Ending in S
8

Questions

How many 13-letter words matching __f_____t____ are there?

12. 6 of them are common words.

What is a common example?

DIFFERENTIALS is among the common words in this set.