12-Letter Words Matching ____S______R

There are 21 12-letter words that match ____S______R. 8 are common words, such as CHEESEBURGER and EAVESDROPPER. A rarer one is TRANSPLANTER. In this set, E is the most frequent open letter (20 words). 10 words contain a doubled letter.

Full list 21

cheeseburgereavesdropperhairsplitterheadshrinkerinvestigatorresuscitatorschussboomertransgressorbrassbounderbreastsummercoldshoulderdisassemblerexpostulatorforeshadowerhomeschoolerklipspringerassassinatorcodiscoverercoresearcherphrasemongertransplanter

About this list

Words
21 (8 common words)
Common example
cheeseburger
Rare example
transplanter
Doubled letters
10
Ending in S
0
Most frequent letter
E (20)

Questions

How many 12-letter words matching ____s______r are there?

21. 8 of them are common words.

What is a common example?

CHEESEBURGER is among the common words in this set.