15-Letter Words Matching ____O________S_

There are 21 15-letter words that match ____O________S_. 7 are common words, such as APPROPRIATENESS and COMFORTABLENESS. A rarer one is SCHOOLMASTERISH. In this set, N is the most frequent open letter (19 words). 11 words contain a doubled letter.

Full list 21

appropriatenesscomfortablenesscosmopolitanismphotojournalismphotojournalistprovocativenessunwholesomenesscommonplacenesshydrodynamicistmetropolitanismpurposelessnessreproachfulnessresponsiblenesschemotaxonomistdichotomousnessgeomorphologistneoconservatismopprobriousnessphenomenologistpreformationistschoolmasterish

About this list

Words
21 (7 common words)
Common example
appropriateness
Rare example
schoolmasterish
Doubled letters
11
Ending in S
10
Most frequent letter
N (19)

Questions

How many 15-letter words matching ____o________s_ are there?

21. 7 of them are common words.

What is a common example?

APPROPRIATENESS is among the common words in this set.