12-Letter Words Matching F_I_________

There are 21 12-letter words that match F_I_________. 8 are common words, such as FAINTHEARTED and FAITHFULNESS. A rarer one is FRIZZINESSES. In this set, E is the most frequent open letter (18 words). 18 words contain a doubled letter.

Full list 21

faintheartedfaithfulnessflimflammingflimsinessesfricasseeingfriendlinessfrigidnessesfriskinessesflickeringlyflimflammeryflittermousefriabilitiesfrictionallyfrictionlessfritillariesfaintishnessfeistinessesflimflammersflintinessesfritillariasfrizzinesses

About this list

Words
21 (8 common words)
Common example
fainthearted
Rare example
frizzinesses
Doubled letters
18
Ending in S
14
Most frequent letter
E (18)

Questions

How many 12-letter words matching f_i_________ are there?

21. 8 of them are common words.

What is a common example?

FAINTHEARTED is among the common words in this set.