13-Letter Words Matching ____S______R_

There are 20 13-letter words that match ____S______R_. 9 are common words, such as CHEESEBURGERS and EAVESDROPPERS. A rarer one is TRANSPLANTERS. In this set, E is the most frequent open letter (18 words). 7 words contain a doubled letter.

Full list 20

cheeseburgerseavesdroppershairsplittersheadshrinkersinvestigatorsinvestigatoryresuscitatorsschussboomerstransgressorsexpostulatorytransitionaryassassinatorscodiscovererscoresearchersforeshadowershomeschoolersphrasemongerspostsecondarysemisedentarytransplanters

About this list

Words
20 (9 common words)
Common example
cheeseburgers
Rare example
transplanters
Doubled letters
7
Ending in S
15
Most frequent letter
E (18)

Questions

How many 13-letter words matching ____s______r_ are there?

20. 9 of them are common words.

What is a common example?

CHEESEBURGERS is among the common words in this set.