12-Letter Words Matching ____SY______

There are 16 12-letter words that match ____SY______. 5 are common words, such as IDIOSYNCRASY and MONOSYLLABIC. A rarer one is POLYSYNAPTIC. 8 words contain a doubled letter.

Full list 16

idiosyncrasymonosyllabicmonosyllablepolysyllabicpolysyllabledecasyllabicdecasyllableoctosyllabicoctosyllableparasynapsispolysyndetonpostsynapticendosymbiontmonosynapticnonpsychoticpolysynaptic

About this list

Words
16 (5 common words)
Common example
idiosyncrasy
Rare example
polysynaptic
Doubled letters
8
Ending in S
1

Questions

How many 12-letter words matching ____sy______ are there?

16. 5 of them are common words.

What is a common example?

IDIOSYNCRASY is among the common words in this set.