15-Letter Words Matching _O_____N_______

There are 20 15-letter words that match _O_____N_______. 5 are common words, such as CONFIDENTIALITY and CONSCIENTIOUSLY. A rarer one is WOEBEGONENESSES. 7 words contain a doubled letter.

Full list 20

confidentialityconscientiouslycontraindicatedcontraindicatesmountaineeringscoinstantaneoussociolinguisticconfidingnessesdorsiventralitydorsoventralityforgivingnesseshomotransplantsmountainousnessnonengineeringsnonsaponifiableposttransfusionroentgenographyroentgenologiesroentgenologistwoebegonenesses

About this list

Words
20 (5 common words)
Common example
confidentiality
Rare example
woebegonenesses
Doubled letters
7
Ending in S
10

Questions

How many 15-letter words matching _o_____n_______ are there?

20. 5 of them are common words.

What is a common example?

CONFIDENTIALITY is among the common words in this set.