15-Letter Words Matching S_L____________

There are 20 15-letter words that match S_L____________. 3 are common words, such as SALACIOUSNESSES and SOLIDIFICATIONS. A rarer one is SULFUROUSNESSES. In this set, I is the most frequent open letter (18 words). 7 words contain a doubled letter.

Full list 20

salaciousnessessolidificationssyllabificationsalpingectomiessclerodermatoussolipsisticallysyllogisticallysclerotizationsselectivenessessilicificationssilversmithingssilviculturallysilviculturistssolderabilitiessolitudinarianssolubilizationssplendiferouslysplenectomizingsulfinpyrazonessulfurousnesses

About this list

Words
20 (3 common words)
Common example
salaciousnesses
Rare example
sulfurousnesses
Doubled letters
7
Ending in S
14
Most frequent letter
I (18)

Questions

How many 15-letter words matching s_l____________ are there?

20. 3 of them are common words.

What is a common example?

SALACIOUSNESSES is among the common words in this set.