11-Letter Words Matching ___TF______

There are 12 11-letter words that match ___TF______. 8 are common words, such as FRETFULNESS and HURTFULNESS. A rarer one is POSTFORMING. In this set, L is the most frequent open letter (11 words). 10 words contain a doubled letter.

Full list 12

fretfulnesshurtfulnessplatformingrestfullestrestfulnesstactfulnesswistfulnesszestfulnesslustfulnessflatfootingfootfaultedpostforming

About this list

Words
12 (8 common words)
Common example
fretfulness
Rare example
postforming
Doubled letters
10
Ending in S
7
Most frequent letter
L (11)

Questions

How many 11-letter words matching ___tf______ are there?

12. 8 of them are common words.

What is a common example?

FRETFULNESS is among the common words in this set.