15-Letter Words Matching __F_________I__

There are 17 15-letter words that match __F_________I__. 5 are common words, such as DIFFERENTIATING and DIFFERENTIATION. A rarer one is REFUNDABILITIES. In this set, T is the most frequent open letter (17 words). 5 words contain a doubled letter.

Full list 17

differentiatingdifferentiationinfallibilitiesinflexibilitiesunfamiliaritiesaffectabilitiesaffordabilitiesanfractuositiesdefeasibilitiesdefensibilitiesinfantilizationinfeasibilitiesreflectometriesreformabilitiesrefortificationrefractometriesrefundabilities

About this list

Words
17 (5 common words)
Common example
differentiating
Rare example
refundabilities
Doubled letters
5
Ending in S
13
Most frequent letter
T (17)

Questions

How many 15-letter words matching __f_________i__ are there?

17. 5 of them are common words.

What is a common example?

DIFFERENTIATING is among the common words in this set.