13-Letter Words Matching F_____L______

There are 14 13-letter words that match F_____L______. 6 are common words, such as FATEFULNESSES and FEARFULNESSES. A rarer one is FUTUROLOGICAL. In this set, S is the most frequent open letter (12 words). 11 words contain a doubled letter.

Full list 14

fatefulnessesfearfulnessesfibrillationsflagellationsfretfulnessesfuturologistsferroelectricfactualnessesfiberglassingfinicalnessesflagellantismflocculationsfurazolidonesfuturological

About this list

Words
14 (6 common words)
Common example
fatefulnesses
Rare example
futurological
Doubled letters
11
Ending in S
10
Most frequent letter
S (12)

Questions

How many 13-letter words matching f_____l______ are there?

14. 6 of them are common words.

What is a common example?

FATEFULNESSES is among the common words in this set.