15-Letter Words Matching ____T________L_

There are 17 15-letter words that match ____T________L_. 5 are common words, such as CONSTITUTIONALS and INDETERMINATELY. A rarer one is UNCATEGORIZABLE. In this set, I is the most frequent open letter (17 words). 10 words contain a doubled letter.

Full list 17

constitutionalsindeterminatelysanctimoniouslysymptomaticallyunintentionallyheartbreakinglyunintelligentlyuninterpretableuninterruptedlyuninterruptibleautotrophicallycounterguerilladiastrophicallygeostrophicallypyrotechnicallyunanticipatedlyuncategorizable

About this list

Words
17 (5 common words)
Common example
constitutionals
Rare example
uncategorizable
Doubled letters
10
Ending in S
1
Most frequent letter
I (17)

Questions

How many 15-letter words matching ____t________l_ are there?

17. 5 of them are common words.

What is a common example?

CONSTITUTIONALS is among the common words in this set.