15-Letter Words Matching __T___T________

There are 23 15-letter words that match __T___T________. 2 are common words, such as AUTHENTICATIONS and TOTALITARIANISM. A rarer one is ULTRASTRUCTURES. In this set, A is the most frequent open letter (23 words). 2 words contain a doubled letter.

Full list 23

authenticationstotalitarianismantinationalistautolithographyinterstratifiedinterstratifiesintractablenessmetamathematicsantimaterialismantimaterialistantimetabolitesantirationalismantirationalistantirationalityautochthonouslyautomatizationsautotetraploidsautotetraploidyfutilitarianismheterothallismstotalitarianizeultrastructuralultrastructures

About this list

Words
23 (2 common words)
Common example
authentications
Rare example
ultrastructures
Doubled letters
2
Ending in S
9
Most frequent letter
A (23)

Questions

How many 15-letter words matching __t___t________ are there?

23. 2 of them are common words.

What is a common example?

AUTHENTICATIONS is among the common words in this set.