14-Letter Words Matching _OP___________

There are 12 14-letter words that match _OP___________. 6 are common words, such as HOPELESSNESSES and LOPSIDEDNESSES. A rarer one is TOPLOFTINESSES. 6 words contain a doubled letter.

Full list 12

hopelessnesseslopsidednessespopularizationpopulousnessessophisticatingsophisticationcopartnershipscopolymerizingoophorectomiessophomoricallycoprosperitiestoploftinesses

About this list

Words
12 (6 common words)
Common example
hopelessnesses
Rare example
toploftinesses
Doubled letters
6
Ending in S
7

Questions

How many 14-letter words matching _op___________ are there?

12. 6 of them are common words.

What is a common example?

HOPELESSNESSES is among the common words in this set.