15-Letter Words Matching ___C____O______

There are 18 15-letter words that match ___C____O______. 4 are common words, such as CONCESSIONAIRES and MISCHIEVOUSNESS. A rarer one is SYNCHRONOUSNESS. In this set, I is the most frequent open letter (16 words). 8 words contain a doubled letter.

Full list 18

concessionairesmischievousnesspunctiliousnessunaccommodatingelectropositivegeochronologistknickerbockeredprecipitousnesspsychobiologistepichlorohydringeochronologiesnincompooperiesnoncontrollablepsychoacousticspsychobiographypsychobiologiessubcategorizingsynchronousness

About this list

Words
18 (4 common words)
Common example
concessionaires
Rare example
synchronousness
Doubled letters
8
Ending in S
9
Most frequent letter
I (16)

Questions

How many 15-letter words matching ___c____o______ are there?

18. 4 of them are common words.

What is a common example?

CONCESSIONAIRES is among the common words in this set.