15-Letter Words Matching ______O____N___

There are 19 15-letter words that match ______O____N___. 7 are common words, such as ACCOMMODATINGLY and ANTIABORTIONIST. A rarer one is SYNCHRONOUSNESS. In this set, I is the most frequent open letter (18 words). 12 words contain a doubled letter.

Full list 19

accommodatinglyantiabortionistblameworthinesscarnivorousnesscosmopolitanismdisappointinglytrustworthinesscosmopolitanizeelectrotechnicsextemporarinessforthcomingnessmetropolitanatemetropolitanismunproportionateunseaworthinesscrashworthinessdichotomousnessdictatorialnesssynchronousness

About this list

Words
19 (7 common words)
Common example
accommodatingly
Rare example
synchronousness
Doubled letters
12
Ending in S
11
Most frequent letter
I (18)

Questions

How many 15-letter words matching ______o____n___ are there?

19. 7 of them are common words.

What is a common example?

ACCOMMODATINGLY is among the common words in this set.