15-Letter Words Matching __M__________S_

There are 18 15-letter words that match __M__________S_. 5 are common words, such as COMFORTABLENESS and COMPETITIVENESS. A rarer one is UNMITIGATEDNESS. In this set, N is the most frequent open letter (18 words). 16 words contain a doubled letter.

Full list 18

comfortablenesscompetitivenesshumanitarianismremorselessnesstempestuousnesscommonplacenesscompendiousnesscompunctionlesshomogeneousnessrumbustiousnesscomparativenesscomplicatednessdomineeringnesssemicolonialismsymmetricalnesstemerariousnessunmelodiousnessunmitigatedness

About this list

Words
18 (5 common words)
Common example
comfortableness
Rare example
unmitigatedness
Doubled letters
16
Ending in S
16
Most frequent letter
N (18)

Questions

How many 15-letter words matching __m__________s_ are there?

18. 5 of them are common words.

What is a common example?

COMFORTABLENESS is among the common words in this set.