7-Letter Words Matching ___S__C

There are 21 7-letter words that match ___S__C. 9 are common words, such as CAUSTIC and CLASSIC. A rarer one is TRISMIC. In this set, I is the most frequent open letter (21 words). 2 words contain a doubled letter.

Full list 21

causticclassicdeisticdrasticelasticplasticprosaicseismicchasmicclasticeristicgnostickarsticmiasmicplasmicprussicanosmicekisticexosmictrismicspastic

About this list

Words
21 (9 common words)
Common example
caustic
Rare example
trismic
Doubled letters
2
Ending in S
0
Most frequent letter
I (21)

Questions

How many 7-letter words matching ___s__c are there?

21. 9 of them are common words.

What is a common example?

CAUSTIC is among the common words in this set.