15-Letter Words Matching ____EA_________

There are 12 15-letter words that match ____EA_________. 5 are common words, such as AGREEABLENESSES and DISHEARTENINGLY. A rarer one is PINHEADEDNESSES. 9 words contain a doubled letter.

Full list 12

agreeablenessesdishearteninglyhotheadednessespigheadednessesuncleanlinessesdisheartenmentseggheadednessesfatheadednessesmismeasurementsovereagernessespeaceablenessespinheadednesses

About this list

Words
12 (5 common words)
Common example
agreeablenesses
Rare example
pinheadednesses
Doubled letters
9
Ending in S
11

Questions

How many 15-letter words matching ____ea_________ are there?

12. 5 of them are common words.

What is a common example?

AGREEABLENESSES is among the common words in this set.