15-Letter Words Matching ____O_________C

There are 18 15-letter words that match ____O_________C. 1 are common words, such as MICROELECTRONIC and CONTORTIONISTIC. A rarer one is RADIOTELEMETRIC. In this set, I is the most frequent open letter (18 words). 2 words contain a doubled letter.

Full list 18

microelectroniccontortionistichistoriographicradiotelephonicsociolinguistichistopathologiclignocellulosicmicrometeoriticneuropathologicneuroscientificpaleogeographicphenomenalisticphotoelectronicphotogrammetricphytogeographicphytopathogenicphytoplanktonicradiotelemetric

About this list

Words
18 (1 common words)
Common example
microelectronic
Rare example
radiotelemetric
Doubled letters
2
Ending in S
0
Most frequent letter
I (18)

Questions

How many 15-letter words matching ____o_________c are there?

18. 1 of them are common words.

What is a common example?

MICROELECTRONIC is among the common words in this set.