15-Letter Words Matching __O_______N____

There are 12 15-letter words that match __O_______N____. 2 are common words, such as PROHIBITIONISTS and UNOBJECTIONABLE. A rarer one is PROLETARIANIZES. In this set, I is the most frequent open letter (12 words). 3 words contain a doubled letter.

Full list 12

prohibitionistsunobjectionablephotomechanicalprointerventionchondrocraniumschorioallantoicchorioallantoiscooperationistsproletarianisedproletarianisesproletarianizedproletarianizes

About this list

Words
12 (2 common words)
Common example
prohibitionists
Rare example
proletarianizes
Doubled letters
3
Ending in S
6
Most frequent letter
I (12)

Questions

How many 15-letter words matching __o_______n____ are there?

12. 2 of them are common words.

What is a common example?

PROHIBITIONISTS is among the common words in this set.