15-Letter Words Matching _O________N____

There are 19 15-letter words that match _O________N____. 4 are common words, such as CONTEMPORANEITY and CONTEMPORANEOUS. A rarer one is NONSIMULTANEOUS. 8 words contain a doubled letter.

Full list 19

contemporaneitycontemporaneousnoninterventionnotwithstandingcomputationallycoeducationallycoinstantaneouscompunctionlesscongressionallyconjugationallyconjunctionallycounterchangingcounterpointingnonconfidentialcompositionallycooperationistsnonpartisanshipnonrecombinantsnonsimultaneous

About this list

Words
19 (4 common words)
Common example
contemporaneity
Rare example
nonsimultaneous
Doubled letters
8
Ending in S
6

Questions

How many 15-letter words matching _o________n____ are there?

19. 4 of them are common words.

What is a common example?

CONTEMPORANEITY is among the common words in this set.