15-Letter Words Matching ________T__T___

There are 20 15-letter words that match ________T__T___. 4 are common words, such as DIFFERENTIATING and DIFFERENTIATION. A rarer one is ULTRAFILTRATION. In this set, R is the most frequent open letter (19 words). 3 words contain a doubled letter.

Full list 20

differentiatingdifferentiationpreregistrationundemonstrativecholecystectomydifferentiatorscounterstrategydeconcentratingdeconcentrationmisregistrationnonarchitectureradioprotectionradioprotectivereconcentratingreconcentrationreorchestratingreorchestrationsupersubtletiestransubstantialultrafiltration

About this list

Words
20 (4 common words)
Common example
differentiating
Rare example
ultrafiltration
Doubled letters
3
Ending in S
2
Most frequent letter
R (19)

Questions

How many 15-letter words matching ________t__t___ are there?

20. 4 of them are common words.

What is a common example?

DIFFERENTIATING is among the common words in this set.