12-Letter Words Matching ______O___O_

There are 21 12-letter words that match ______O___O_. 9 are common words, such as ANTIABORTION and BACHELORHOOD. A rarer one is TRICHLORPHON. In this set, R is the most frequent open letter (19 words). 8 words contain a doubled letter.

Full list 21

antiabortionbachelorhoodcollaboratorcommemoratorcorroboratorimpersonatorinterlocutorinterrogatorneighborhoodelectromotorextrapolatorhaematoxylonincorporatorinterpolatorprolegomenonreciprocatoraccommodatorafficionadosfractionatorpostabortiontrichlorphon

About this list

Words
21 (9 common words)
Common example
antiabortion
Rare example
trichlorphon
Doubled letters
8
Ending in S
1
Most frequent letter
R (19)

Questions

How many 12-letter words matching ______o___o_ are there?

21. 9 of them are common words.

What is a common example?

ANTIABORTION is among the common words in this set.