15-Letter Words Matching _N____M________

There are 16 15-letter words that match _N____M________. 7 are common words, such as INSTRUMENTALIST and INSTRUMENTALITY. A rarer one is UNIFORMITARIANS. In this set, I is the most frequent open letter (15 words). 4 words contain a doubled letter.

Full list 16

instrumentalistinstrumentalityinstrumentationunaccommodatingunceremoniouslyunderemploymentungrammaticallyanagrammatizinginflammablenessinstrumentalismanticompetitiveantiromanticismenvenomizationsunderemphasizedunderemphasizesuniformitarians

About this list

Words
16 (7 common words)
Common example
instrumentalist
Rare example
uniformitarians
Doubled letters
4
Ending in S
4
Most frequent letter
I (15)

Questions

How many 15-letter words matching _n____m________ are there?

16. 7 of them are common words.

What is a common example?

INSTRUMENTALIST is among the common words in this set.