12-Letter Words Matching O_____S_____

There are 18 12-letter words that match O_____S_____. 3 are common words, such as OBSOLESCENCE and OPPRESSIVELY. A rarer one is OVERRESPONDS. In this set, E is the most frequent open letter (16 words). 4 words contain a doubled letter.

Full list 18

obsolescenceoppressivelyovermasteredobmutescenceovercastingsoverdesirousoleoresinousoligopsoniesoptimisationorganisationoutwrestlingoverabstractoverassertedoverdesignedoverdiscountoverinsuringoverissuanceoverresponds

About this list

Words
18 (3 common words)
Common example
obsolescence
Rare example
overresponds
Doubled letters
4
Ending in S
5
Most frequent letter
E (16)

Questions

How many 12-letter words matching o_____s_____ are there?

18. 3 of them are common words.

What is a common example?

OBSOLESCENCE is among the common words in this set.