15-Letter Words Matching __T________R___

There are 17 15-letter words that match __T________R___. 3 are common words, such as ENTREPRENEURIAL and EXTRAORDINARILY. A rarer one is METHYLMERCURIES. In this set, E is the most frequent open letter (16 words). 2 words contain a doubled letter.

Full list 17

entrepreneurialextraordinarilyinterrogatoriesanthropometriesanticholinergicautotransformerentrepreneurisminterrogatorilyintrapreneurialantiegalitarianantilibertarianastrophotographcytochemistriesenterobacterialenterobacteriuminterlacustrinemethylmercuries

About this list

Words
17 (3 common words)
Common example
entrepreneurial
Rare example
methylmercuries
Doubled letters
2
Ending in S
4
Most frequent letter
E (16)

Questions

How many 15-letter words matching __t________r___ are there?

17. 3 of them are common words.

What is a common example?

ENTREPRENEURIAL is among the common words in this set.