10-Letter Words Matching ____TF____

There are 14 10-letter words that match ____TF____. 11 are common words, such as BOASTFULLY and DOUBTFULLY. A rarer one is TRISTFULLY. In this set, L is the most frequent open letter (13 words). 11 words contain a doubled letter.

Full list 14

boastfullydoubtfullyeventfullyfruitfullylightfacedlightfacesnightfallsrightfullyshirtfrontshortfallstrustfullyghastfullysportfullytristfully

About this list

Words
14 (11 common words)
Common example
boastfully
Rare example
tristfully
Doubled letters
11
Ending in S
3
Most frequent letter
L (13)

Questions

How many 10-letter words matching ____tf____ are there?

14. 11 of them are common words.

What is a common example?

BOASTFULLY is among the common words in this set.