12-Letter Words Matching _S_____T____

There are 14 12-letter words that match _S_____T____. 9 are common words, such as ASSIGNATIONS and ASSOCIATIONS. A rarer one is USUFRUCTUARY. In this set, A is the most frequent open letter (14 words). 4 words contain a doubled letter.

Full list 14

assignationsassociationsastigmatismsoscillationsostentationsostentatiousosteopathiespsychiatriespsychiatristastrometriesasymptoticalassentationsastrocytomasusufructuary

About this list

Words
14 (9 common words)
Common example
assignations
Rare example
usufructuary
Doubled letters
4
Ending in S
11
Most frequent letter
A (14)

Questions

How many 12-letter words matching _s_____t____ are there?

14. 9 of them are common words.

What is a common example?

ASSIGNATIONS is among the common words in this set.