15-Letter Words Matching _________M__T__

There are 12 15-letter words that match _________M__T__. 2 are common words, such as NONDEPARTMENTAL and NONGOVERNMENTAL. A rarer one is NONINSTRUMENTAL. In this set, E is the most frequent open letter (12 words). 2 words contain a doubled letter.

Full list 12

nondepartmentalnongovernmentalactinochemistrybiogeochemistryimmunochemistrynonexperimentaloverpessimisticpronunciamentosstereochemistrythermochemistryantisentimentalnoninstrumental

About this list

Words
12 (2 common words)
Common example
nondepartmental
Rare example
noninstrumental
Doubled letters
2
Ending in S
1
Most frequent letter
E (12)

Questions

How many 15-letter words matching _________m__t__ are there?

12. 2 of them are common words.

What is a common example?

NONDEPARTMENTAL is among the common words in this set.