11-Letter Words Matching N________M_

There are 13 11-letter words that match N________M_. 5 are common words, such as NARCISSISMS and NASTURTIUMS. A rarer one is NONPROGRAMS. In this set, S is the most frequent open letter (12 words). 1 words contain a doubled letter.

Full list 13

narcissismsnasturtiumsnaturalismsnegativismsneutralismsnatatoriumsnephrectomynominalismsneorealismsnephrostomenonconformsnonproblemsnonprograms

About this list

Words
13 (5 common words)
Common example
narcissisms
Rare example
nonprograms
Doubled letters
1
Ending in S
11
Most frequent letter
S (12)

Questions

How many 11-letter words matching n________m_ are there?

13. 5 of them are common words.

What is a common example?

NARCISSISMS is among the common words in this set.