15-Letter Words Matching __T_________T__

There are 16 15-letter words that match __T_________T__. 1 are common words, such as INTERSCHOLASTIC and ACTINOCHEMISTRY. A rarer one is ULTRADEMOCRATIC. In this set, A is the most frequent open letter (16 words). 2 words contain a doubled letter.

Full list 16

interscholasticactinochemistryextralinguisticheterochromaticheterochromatininterpenetratedinterpenetratesorthopsychiatryultramicrometerantimetabolitesantisentimentalintercorrelatedintercorrelatesintransigeantlyorthophosphatesultrademocratic

About this list

Words
16 (1 common words)
Common example
interscholastic
Rare example
ultrademocratic
Doubled letters
2
Ending in S
4
Most frequent letter
A (16)

Questions

How many 15-letter words matching __t_________t__ are there?

16. 1 of them are common words.

What is a common example?

INTERSCHOLASTIC is among the common words in this set.