13-Letter Words Matching __RD_________

There are 12 13-letter words that match __RD_________. 2 are common words, such as CARDIOLOGISTS and HARDHEARTEDLY. A rarer one is HARDSTANDINGS. In this set, A is the most frequent open letter (11 words). 2 words contain a doubled letter.

Full list 12

cardiologistshardheartedlycardinalshipscardiologicalmurderousnessperdurabilitycardinalitiescardiographiccardiopathiescordialnessescordwainerieshardstandings

About this list

Words
12 (2 common words)
Common example
cardiologists
Rare example
hardstandings
Doubled letters
2
Ending in S
8
Most frequent letter
A (11)

Questions

How many 13-letter words matching __rd_________ are there?

12. 2 of them are common words.

What is a common example?

CARDIOLOGISTS is among the common words in this set.