15-Letter Words Matching _____S______R__

There are 12 15-letter words that match _____S______R__. 3 are common words, such as CONCESSIONAIRES and INFRASTRUCTURES. A rarer one is ULTRASTRUCTURES. In this set, C is the most frequent open letter (12 words). 2 words contain a doubled letter.

Full list 12

concessionairesinfrastructuressuperstructurescommissionairesinfrastructuralsuperstructuralmacrostructuralmacrostructuresmicrostructuralmicrostructuresultrastructuralultrastructures

About this list

Words
12 (3 common words)
Common example
concessionaires
Rare example
ultrastructures
Doubled letters
2
Ending in S
7
Most frequent letter
C (12)

Questions

How many 15-letter words matching _____s______r__ are there?

12. 3 of them are common words.

What is a common example?

CONCESSIONAIRES is among the common words in this set.