15-Letter Words Matching ____OC_________

There are 31 15-letter words that match ____OC_________. 3 are common words, such as HYDROCEPHALUSES and NITROCELLULOSES. A rarer one is VIDEOCONFERENCE. In this set, I is the most frequent open letter (30 words). 12 words contain a doubled letter.

Full list 31

Common words

hydrocephalusesnitrocellulosesprovocativenessadenocarcinomascyanocobalaminsethnocentricityheliocentricityhistocompatiblehydrocortisonesmacrocosmicallymicrocosmicallynitrochloroform
hydrocephalusesnitrocellulosesprovocativenessadenocarcinomascyanocobalaminsethnocentricityheliocentricityhistocompatiblehydrocortisonesmacrocosmicallymicrocosmicallynitrochloroformphotochemicallyphotoconductioncyanocobalamineglucocorticoidshistochemicallylignocelluloseslignocellulosicmisvocalizationphonocardiogramphotoconductivephytochemicallyplutocraticallyradiochemicallyschlockmeisterssocioculturallysubvocalizationthyrocalcitonintrisoctahedronsvideoconference

About this list

Words
31 (3 common words)
Common example
hydrocephaluses
Rare example
videoconference
Doubled letters
12
Ending in S
10
Most frequent letter
I (30)

Questions

How many 15-letter words matching ____oc_________ are there?

31. 3 of them are common words.

What is a common example?

HYDROCEPHALUSES is among the common words in this set.