11-Letter Words Matching O________O_

There are 22 11-letter words that match O________O_. 12 are common words, such as OBFUSCATION and OBJURGATION. A rarer one is OZONIZATION. 4 words contain a doubled letter.

Full list 22

obfuscationobjurgationobservationobstructionofficialdomorientationoriginationoscillationostentationoverdevelopoxidizationoxygenationobliteratorobscurationobstipationoccultationofficiationorchestrionovercautionovercontrolovipositionozonization

About this list

Words
22 (12 common words)
Common example
obfuscation
Rare example
ozonization
Doubled letters
4
Ending in S
0

Questions

How many 11-letter words matching o________o_ are there?

22. 12 of them are common words.

What is a common example?

OBFUSCATION is among the common words in this set.