12-Letter Words Matching O________N__

There are 23 12-letter words that match O________N__. 7 are common words, such as OBSOLESCENCE and OCCUPATIONAL. A rarer one is OVERRESPONDS. In this set, R is the most frequent open letter (18 words). 8 words contain a doubled letter.

Full list 23

obsolescenceoccupationalomnipresenceoutbuildingsoutcroppingsoutsourcingsoverburdenedobmutescenceoppositionalornithomancyovercastingsoverstrainedoffscouringsoutbargainedoutbreedingsoverdesignedovergarmentsovergovernedoverhuntingsoverissuanceoverpaymentsoverrelianceoverresponds

About this list

Words
23 (7 common words)
Common example
obsolescence
Rare example
overresponds
Doubled letters
8
Ending in S
10
Most frequent letter
R (18)

Questions

How many 12-letter words matching o________n__ are there?

23. 7 of them are common words.

What is a common example?

OBSOLESCENCE is among the common words in this set.