13-Letter Words Matching ____S__P_____

There are 12 13-letter words that match ____S__P_____. 4 are common words, such as BACKSLAPPINGS and INSUSCEPTIBLE. A rarer one is REASSUMPTIONS. 4 words contain a doubled letter.

Full list 12

backslappingsinsusceptibleoversupplyingundisciplinedindisciplinesoverskepticalunsusceptibleergastoplasmsglasspaperingindisciplinedinsusceptiblyreassumptions

About this list

Words
12 (4 common words)
Common example
backslappings
Rare example
reassumptions
Doubled letters
4
Ending in S
4

Questions

How many 13-letter words matching ____s__p_____ are there?

12. 4 of them are common words.

What is a common example?

BACKSLAPPINGS is among the common words in this set.