15-Letter Words Matching S____________T_

There are 18 15-letter words that match S____________T_. 5 are common words, such as SEGREGATIONISTS and SENSATIONALISTS. A rarer one is SUPPRESSIBILITY. In this set, S is the most frequent open letter (17 words). 1 words contain a doubled letter.

Full list 18

segregationistssensationalistssentimentalistsstraightjacketssuperintendentssesquicarbonatesimplicidentatesociobiologistssacramentalistssemiretirementssilviculturistsspectroscopistssubdevelopmentssubproletariatssuperabsorbentssupercontinentssuperplasticitysuppressibility

About this list

Words
18 (5 common words)
Common example
segregationists
Rare example
suppressibility
Doubled letters
1
Ending in S
14
Most frequent letter
S (17)

Questions

How many 15-letter words matching s____________t_ are there?

18. 5 of them are common words.

What is a common example?

SEGREGATIONISTS is among the common words in this set.