13-Letter Words Matching _NH__________

There are 12 13-letter words that match _NH__________. 2 are common words, such as UNHAPPINESSES and UNHEALTHINESS. A rarer one is UNHOMOGENIZED. In this set, I is the most frequent open letter (12 words). 6 words contain a doubled letter.

Full list 12

unhappinessesunhealthinessinhabitanciesinhomogeneityinhomogeneousinhospitalityinhabitationsinheritressesinhumannessesunhandicappedunhandinessesunhomogenized

About this list

Words
12 (2 common words)
Common example
unhappinesses
Rare example
unhomogenized
Doubled letters
6
Ending in S
8
Most frequent letter
I (12)

Questions

How many 13-letter words matching _nh__________ are there?

12. 2 of them are common words.

What is a common example?

UNHAPPINESSES is among the common words in this set.