13-Letter Words Matching __C______O___

There are 21 13-letter words that match __C______O___. 8 are common words, such as ARCHITECTONIC and BACHELORHOODS. A rarer one is PICTUREPHONES. In this set, I is the most frequent open letter (20 words). 4 words contain a doubled letter.

Full list 21

architectonicbachelorhoodsbacteriologicoscilloscopesreconditionedsocioeconomicunconditionalunconditionedarchidiaconaldeclinationalincantationalmacroeconomicmicroeconomicoscilloscopicbiconditionaldeconditionedinclinationalmicrobiologicmicrocosmosesoscillationalpicturephones

About this list

Words
21 (8 common words)
Common example
architectonic
Rare example
picturephones
Doubled letters
4
Ending in S
4
Most frequent letter
I (20)

Questions

How many 13-letter words matching __c______o___ are there?

21. 8 of them are common words.

What is a common example?

ARCHITECTONIC is among the common words in this set.