12-Letter Words Matching ____O_____G_

There are 22 12-letter words that match ____O_____G_. 4 are common words, such as MICROBIOLOGY and OUTSOURCINGS. A rarer one is RADIOECOLOGY. In this set, O is the most frequent open letter (20 words). 3 words contain a doubled letter.

Full list 22

microbiologyoutsourcingspaleontologysurroundingsastrobiologyastrogeologyhydrogeologyneurobiologypaleobiologypaleoecologypaleozoologyphotomontagephytobiologyprotozoologyradiobiologysociobiologybedcoveringshydrobiologypathobiologyphotobiologyphotogeologyradioecology

About this list

Words
22 (4 common words)
Common example
microbiology
Rare example
radioecology
Doubled letters
3
Ending in S
3
Most frequent letter
O (20)

Questions

How many 12-letter words matching ____o_____g_ are there?

22. 4 of them are common words.

What is a common example?

MICROBIOLOGY is among the common words in this set.