15-Letter Words Matching S________I_____

There are 30 15-letter words that match S________I_____. 5 are common words, such as SANCTIMONIOUSLY and SUPERSTITIOUSLY. A rarer one is SYMPATHOMIMETIC. In this set, T is the most frequent open letter (27 words). 14 words contain a doubled letter.

Full list 30

Common words

sanctimoniouslysuperstitiouslysurreptitiouslysympatheticallysymptomaticallysaprophyticallysocialisticallysolipsisticallystereotypicallysublapsarianismsuperpatriotismsycophantically
sanctimoniouslysuperstitiouslysurreptitiouslysympatheticallysymptomaticallysaprophyticallysocialisticallysolipsisticallystereotypicallysublapsarianismsuperpatriotismsycophanticallysyllogisticallysynecdochicallysynergisticallysabermetriciansschlockmeisterssemicolonialismsemilogarithmicseptendecillionstereologicallystereotaxicallystrongyloidosesstrongyloidosissubreptitiouslysubstitutionarysupercontinentssupernutritionssuperspecialistsympathomimetic

About this list

Words
30 (5 common words)
Common example
sanctimoniously
Rare example
sympathomimetic
Doubled letters
14
Ending in S
6
Most frequent letter
T (27)

Questions

How many 15-letter words matching s________i_____ are there?

30. 5 of them are common words.

What is a common example?

SANCTIMONIOUSLY is among the common words in this set.