15-Letter Words Matching ____T____I_____

There are 20 15-letter words that match ____T____I_____. 5 are common words, such as CONSTITUTIONALS and CONSTRUCTIONIST. A rarer one is UNCATEGORIZABLE. In this set, O is the most frequent open letter (19 words). 5 words contain a doubled letter.

Full list 20

constitutionalsconstructionisthypothyroidismssanctimoniouslysymptomaticallyunauthenticatedconstructivismsconstructivistscounterpointingprestidigitatorautotrophicallycounterevidencecounterweightedcryptorchidismsdiastereoisomerdiastrophicallygeostrophicallypyrotechnicallysubstitutionaryuncategorizable

About this list

Words
20 (5 common words)
Common example
constitutionals
Rare example
uncategorizable
Doubled letters
5
Ending in S
5
Most frequent letter
O (19)

Questions

How many 15-letter words matching ____t____i_____ are there?

20. 5 of them are common words.

What is a common example?

CONSTITUTIONALS is among the common words in this set.