15-Letter Words Matching _______T_M_____

There are 13 15-letter words that match _______T_M_____. 2 are common words, such as UNDERESTIMATING and UNDERESTIMATION. A rarer one is SPLENECTOMIZING. In this set, I is the most frequent open letter (13 words). 2 words contain a doubled letter.

Full list 13

underestimatingunderestimationancylostomiasisankylostomiasisancylostomiasesankylostomiasesantihistaminicsantisentimentalcytophotometricdiffractometersdiffractometricnephrectomizingsplenectomizing

About this list

Words
13 (2 common words)
Common example
underestimating
Rare example
splenectomizing
Doubled letters
2
Ending in S
6
Most frequent letter
I (13)

Questions

How many 15-letter words matching _______t_m_____ are there?

13. 2 of them are common words.

What is a common example?

UNDERESTIMATING is among the common words in this set.