15-Letter Words Matching ____O______N___

There are 28 15-letter words that match ____O______N___. 11 are common words, such as APPROPRIATENESS and COMFORTABLENESS. A rarer one is UNPROFESSIONALS. In this set, E is the most frequent open letter (27 words). 12 words contain a doubled letter.

Full list 28

Common words

appropriatenesscomfortablenesscosmopolitanismdisconcertinglydiscontinuancesdiscountenanceddiscountenancesnongovernmentalpreconditioningprovocativenessunwholesomenesscommonplaceness
appropriatenesscomfortablenesscosmopolitanismdisconcertinglydiscontinuancesdiscountenanceddiscountenancesnongovernmentalpreconditioningprovocativenessunwholesomenesscommonplacenesscosmopolitanizemetropolitanatemetropolitanismmiscomprehendednonconformancespurposelessnessreproachfulnessresponsiblenessunproportionatedichotomousnessnoncoincidencesnonconcurrencesopprobriousnesspreformationistretroperitonealunprofessionals

About this list

Words
28 (11 common words)
Common example
appropriateness
Rare example
unprofessionals
Doubled letters
12
Ending in S
16
Most frequent letter
E (27)

Questions

How many 15-letter words matching ____o______n___ are there?

28. 11 of them are common words.

What is a common example?

APPROPRIATENESS is among the common words in this set.