15-Letter Words Matching C_____S________

There are 20 15-letter words that match C_____S________. 5 are common words, such as CIRCUMSCRIPTION and CIRCUMSPECTIONS. A rarer one is COTRANSDUCTIONS. 13 words contain a doubled letter.

Full list 20

circumscriptioncircumspectionscompassionatelyconcessionairescongresspersonscentrosymmetriccircumstantiatecommissionairescompressibilitycongressionallyconnoisseurshipconsubstantiateclandestinenessclandestinitiescoinvestigatorscommensurationscompassionatingconfessionalismconfessionalistcotransductions

About this list

Words
20 (5 common words)
Common example
circumscription
Rare example
cotransductions
Doubled letters
13
Ending in S
9

Questions

How many 15-letter words matching c_____s________ are there?

20. 5 of them are common words.

What is a common example?

CIRCUMSCRIPTION is among the common words in this set.