15-Letter Words Matching _____AD________

There are 13 15-letter words that match _____AD________. 2 are common words, such as HOTHEADEDNESSES and PIGHEADEDNESSES. A rarer one is XERORADIOGRAPHY. 5 words contain a doubled letter.

Full list 13

hotheadednessespigheadednessesautoradiographscontradictorilylymphadenopathyantiradicalismsautoradiographycontradictorieseggheadednessesfatheadednesseslymphadenitisespinheadednessesxeroradiography

About this list

Words
13 (2 common words)
Common example
hotheadednesses
Rare example
xeroradiography
Doubled letters
5
Ending in S
9

Questions

How many 15-letter words matching _____ad________ are there?

13. 2 of them are common words.

What is a common example?

HOTHEADEDNESSES is among the common words in this set.