13-Letter Words Matching S__________M_

There are 17 13-letter words that match S__________M_. 4 are common words, such as SECTARIANISMS and SECTIONALISMS. A rarer one is SYNDACTYLISMS. 4 words contain a doubled letter.

Full list 17

sectarianismssectionalismssomnambulismsspiritualismssalpingectomysecessionismssubjectivismssalvationismsscapegoatismsstandpattismssuperpremiumssuperrealismssuperstardomssycophantismssymmetallismssympathectomysyndactylisms

About this list

Words
17 (4 common words)
Common example
sectarianisms
Rare example
syndactylisms
Doubled letters
4
Ending in S
15

Questions

How many 13-letter words matching s__________m_ are there?

17. 4 of them are common words.

What is a common example?

SECTARIANISMS is among the common words in this set.