14-Letter Words Matching _________TN___

There are 12 14-letter words that match _________TN___. 5 are common words, such as FORTHRIGHTNESS and INDISTINCTNESS. A rarer one is WATERTIGHTNESS. 11 words contain a doubled letter.

Full list 12

forthrightnessindistinctnesskindergartnerssacrosanctnessunpleasantnessincoherentnessindiscreetnessbenevolentnessfraudulentnessintolerantnessroundaboutnesswatertightness

About this list

Words
12 (5 common words)
Common example
forthrightness
Rare example
watertightness
Doubled letters
11
Ending in S
12

Questions

How many 14-letter words matching _________tn___ are there?

12. 5 of them are common words.

What is a common example?

FORTHRIGHTNESS is among the common words in this set.