15-Letter Words Matching _____C_____N___

There are 12 15-letter words that match _____C_____N___. 2 are common words, such as HALLUCINOGENICS and PROVOCATIVENESS. A rarer one is UNCONCERNEDNESS. 11 words contain a doubled letter.

Full list 12

hallucinogenicsprovocativenessconsecutivenessdisenchantinglyduplicitousnessforthcomingnessimpracticalnessintractablenessserviceablenessimplicativenessrespectablenessunconcernedness

About this list

Words
12 (2 common words)
Common example
hallucinogenics
Rare example
unconcernedness
Doubled letters
11
Ending in S
11

Questions

How many 15-letter words matching _____c_____n___ are there?

12. 2 of them are common words.

What is a common example?

HALLUCINOGENICS is among the common words in this set.