15-Letter Words Matching ___S__________Y

There are 20 15-letter words that match ___S__________Y. 5 are common words, such as CONSCIENTIOUSLY and CONSEQUENTIALLY. A rarer one is SUBSTITUTIONARY. In this set, A is the most frequent open letter (19 words). 11 words contain a doubled letter.

Full list 20

conscientiouslyconsequentiallyperspicaciouslypessimisticallyphysiologicallycrystallographydissatisfactoryquestionabilityunassailabilityanisotropicallybiostratigraphyconsentaneouslydiastrophicallydorsiventralitydorsoventralitygeostrophicallynonspecificallyphysiopathologypresynapticallysubstitutionary

About this list

Words
20 (5 common words)
Common example
conscientiously
Rare example
substitutionary
Doubled letters
11
Ending in S
0
Most frequent letter
A (19)

Questions

How many 15-letter words matching ___s__________y are there?

20. 5 of them are common words.

What is a common example?

CONSCIENTIOUSLY is among the common words in this set.