12-Letter Words Matching _____P__O___

There are 20 12-letter words that match _____P__O___. 9 are common words, such as CHILDPROOFED and CONCEPTIONAL. A rarer one is WATERPROOFER. In this set, E is the most frequent open letter (18 words). 8 words contain a doubled letter.

Full list 20

childproofedconceptionalflameproofedosteoporosesosteoporosisperceptionalsoundproofedunchaperonedwaterproofedlollapaloosalollapaloozaosteoporoticprosopopoeiaredemptionalredemptionerflameproofermiscaptionedpronephrosesprotophloemswaterproofer

About this list

Words
20 (9 common words)
Common example
childproofed
Rare example
waterproofer
Doubled letters
8
Ending in S
4
Most frequent letter
E (18)

Questions

How many 12-letter words matching _____p__o___ are there?

20. 9 of them are common words.

What is a common example?

CHILDPROOFED is among the common words in this set.