15-Letter Words Matching ______T______T_

There are 15 15-letter words that match ______T______T_. 8 are common words, such as CONVENTIONALITY and DISCONTENTMENTS. A rarer one is SEMIRETIREMENTS. In this set, I is the most frequent open letter (14 words). 0 words contain a doubled letter.

Full list 15

conventionalitydiscontentmentsimpenetrabilitynonparticipantspaleontologistsphilanthropistsproportionalityunderstatementsdemonstrabilityantirationalitybiosystematistsdialectologistsparasitologistsrheumatologistssemiretirements

About this list

Words
15 (8 common words)
Common example
conventionality
Rare example
semiretirements
Doubled letters
0
Ending in S
10
Most frequent letter
I (14)

Questions

How many 15-letter words matching ______t______t_ are there?

15. 8 of them are common words.

What is a common example?

CONVENTIONALITY is among the common words in this set.