12-Letter Words Matching O__________N

There are 19 12-letter words that match O__________N. 9 are common words, such as OBLITERATION and OBSTETRICIAN. A rarer one is OVERSTRIDDEN. In this set, I is the most frequent open letter (17 words). 3 words contain a doubled letter.

Full list 19

obliterationobstetricianoctogenarianoleomargarinoptimizationorganizationossificationoverexertionoverreactionoverambitionovertaxationobnubilationoleandomycinonomasticianonychophoranoptimisationorganisationoverlengthenoverstridden

About this list

Words
19 (9 common words)
Common example
obliteration
Rare example
overstridden
Doubled letters
3
Ending in S
0
Most frequent letter
I (17)

Questions

How many 12-letter words matching o__________n are there?

19. 9 of them are common words.

What is a common example?

OBLITERATION is among the common words in this set.