12-Letter Words Matching ____P__O____

There are 20 12-letter words that match ____P__O____. 12 are common words, such as BOMBPROOFING and DISAPPROVALS. A rarer one is PREAPPROVING. In this set, R is the most frequent open letter (17 words). 11 words contain a doubled letter.

Full list 20

bombproofingdisapprovalsdisapprovingfireproofingheatproofingprosperouslyreceptionistrustproofingscrupulosityscrupulouslysharpshootervoluptuouslyescapologistmothproofingviviparouslydisapproversendoperoxideescapologiesmothprooferspreapproving

About this list

Words
20 (12 common words)
Common example
bombproofing
Rare example
preapproving
Doubled letters
11
Ending in S
4
Most frequent letter
R (17)

Questions

How many 12-letter words matching ____p__o____ are there?

20. 12 of them are common words.

What is a common example?

BOMBPROOFING is among the common words in this set.