12-Letter Words Matching _S___T______

There are 18 12-letter words that match _S___T______. 7 are common words, such as ASCERTAINING and ASYMPTOMATIC. A rarer one is ISOBUTYLENES. In this set, I is the most frequent open letter (18 words). 6 words contain a doubled letter.

Full list 18

ascertainingasymptomaticestheticallyisolationismisolationistostentationsostentatiousasymptoticalessentialismessentialistessentialityessentializeestheticiansisometropiasassentationsestheticismsisoantigenicisobutylenes

About this list

Words
18 (7 common words)
Common example
ascertaining
Rare example
isobutylenes
Doubled letters
6
Ending in S
7
Most frequent letter
I (18)

Questions

How many 12-letter words matching _s___t______ are there?

18. 7 of them are common words.

What is a common example?

ASCERTAINING is among the common words in this set.