14-Letter Words Matching __N_M_________

There are 18 14-letter words that match __N_M_________. 3 are common words, such as CINEMATOGRAPHY and DENOMINATIONAL. A rarer one is VENOMOUSNESSES. In this set, O is the most frequent open letter (17 words). 5 words contain a doubled letter.

Full list 18

cinematographydenominationalornamentationscinematizationdynamoelectricmonumentalizedmonumentalizesnonimportationcinematographsdenumerabilitymanometricallymonomaniacallymonometallismsmonometallistsnonemergenciesnonemploymentsnonimplicationvenomousnesses

About this list

Words
18 (3 common words)
Common example
cinematography
Rare example
venomousnesses
Doubled letters
5
Ending in S
8
Most frequent letter
O (17)

Questions

How many 14-letter words matching __n_m_________ are there?

18. 3 of them are common words.

What is a common example?

CINEMATOGRAPHY is among the common words in this set.