13-Letter Words Matching ____O___G____

There are 21 13-letter words that match ____O___G____. 4 are common words, such as NEUROSURGEONS and NONCONTAGIOUS. A rarer one is SUBCOLLEGIATE. In this set, I is the most frequent open letter (16 words). 3 words contain a doubled letter.

Full list 21

neurosurgeonsnoncontagioussarcophagusesthoroughgoinganeroidographeusporangiatemicrosurgicalneurosurgicalnoncontiguousprotolanguagechemosurgicalmicrofungusesmicroprogramsnoncollegiatenonconjugatedphysostigmineprecollegiaterechoreographsociolinguiststeroidogenicsubcollegiate

About this list

Words
21 (4 common words)
Common example
neurosurgeons
Rare example
subcollegiate
Doubled letters
3
Ending in S
6
Most frequent letter
I (16)

Questions

How many 13-letter words matching ____o___g____ are there?

21. 4 of them are common words.

What is a common example?

NEUROSURGEONS is among the common words in this set.