11-Letter Words Matching ____S_N____

There are 20 11-letter words that match ____S_N____. 7 are common words, such as FOLKSINGERS and FOLKSINGING. A rarer one is TYROSINASES. 4 words contain a doubled letter.

Full list 20

folksingersfolksinginginessentialpleasantestthousandthstreasonableunessentialsingsongingartisanshipcoessentiallandsknechtrecusanciesthrasonicalunresentfulchansonniereicosanoidspostsyncingtreasonablytrypsinogentyrosinases

About this list

Words
20 (7 common words)
Common example
folksingers
Rare example
tyrosinases
Doubled letters
4
Ending in S
5

Questions

How many 11-letter words matching ____s_n____ are there?

20. 7 of them are common words.

What is a common example?

FOLKSINGERS is among the common words in this set.