15-Letter Words Matching ____SS_________

There are 22 15-letter words that match ____SS_________. 9 are common words, such as ACCESSIBILITIES and ADMISSIBILITIES. A rarer one is UNFOSSILIFEROUS. In this set, I is the most frequent open letter (21 words). 22 words contain a doubled letter.

Full list 22

accessibilitiesadmissibilitiesambassadorshipsdisassociationsimpassibilitiesimpassivenessesimpossibilitiesobsessivenessestranssexualismsexcessivenessesincessantnessesindissolubilityintussusceptionnecessaritarianvicissitudinousbremsstrahlungsimpassabilitiesintussusceptingintussusceptivenecessitousnessrecessivenessesunfossiliferous

About this list

Words
22 (9 common words)
Common example
accessibilities
Rare example
unfossiliferous
Doubled letters
22
Ending in S
17
Most frequent letter
I (21)

Questions

How many 15-letter words matching ____ss_________ are there?

22. 9 of them are common words.

What is a common example?

ACCESSIBILITIES is among the common words in this set.