13-Letter Words Matching __S________I_

There are 19 13-letter words that match __S________I_. 3 are common words, such as CUSTODIANSHIP and DISEQUILIBRIA. A rarer one is VISCOSIMETRIC. 5 words contain a doubled letter.

Full list 19

custodianshipdisequilibriaunsympatheticassociateshipcosponsorshipmesencephalicpassementerieassistantshipcysticercosisdysmenorrheichistaminergicinspectorshippostbourgeoispostembryonicpostepilepticposttraumaticrespirometricunsymptomaticviscosimetric

About this list

Words
19 (3 common words)
Common example
custodianship
Rare example
viscosimetric
Doubled letters
5
Ending in S
2

Questions

How many 13-letter words matching __s________i_ are there?

19. 3 of them are common words.

What is a common example?

CUSTODIANSHIP is among the common words in this set.