13-Letter Words Matching _S_________L_

There are 12 13-letter words that match _S_________L_. 4 are common words, such as ASCERTAINABLE and ASTONISHINGLY. A rarer one is ISOSTATICALLY. In this set, I is the most frequent open letter (12 words). 8 words contain a doubled letter.

Full list 12

ascertainableastonishinglyisometricallypsychoticallyassociativelyasthmaticallyassortativelyasyndeticallyestablishableisochronouslyisosmoticallyisostatically

About this list

Words
12 (4 common words)
Common example
ascertainable
Rare example
isostatically
Doubled letters
8
Ending in S
0
Most frequent letter
I (12)

Questions

How many 13-letter words matching _s_________l_ are there?

12. 4 of them are common words.

What is a common example?

ASCERTAINABLE is among the common words in this set.