15-Letter Words Matching ____T________T_

There are 15 15-letter words that match ____T________T_. 2 are common words, such as EXISTENTIALISTS and MAINTAINABILITY. A rarer one is SPECTROSCOPISTS. 3 words contain a doubled letter.

Full list 15

existentialistsmaintainabilityconstructivistscountercurrentsepistemologistsinextricabilityquestionabilityunattainabilitycounterassaultscounterprojectscounterprotestselectrodepositshomotransplantsprosthodontistsspectroscopists

About this list

Words
15 (2 common words)
Common example
existentialists
Rare example
spectroscopists
Doubled letters
3
Ending in S
11

Questions

How many 15-letter words matching ____t________t_ are there?

15. 2 of them are common words.

What is a common example?

EXISTENTIALISTS is among the common words in this set.