It's actually a ligature for "sz" - at least it used to be. You probably won't find many german words that have an actual "sz" in them.
If you squint and your font permitting, ſz should look more like ß.
FRAKTIONSZWANG FREIHANDELSZONE KONFISZIEREN [...]
A lot of them are combined, but still quite a few 'regular' ones
Abszeß - Adoleszenz - Disziplin - Eszett - Faszie - Faszination - Fluoreszenz - Koaleszenz - Konfiszierung - lasziv - Lumineszenz - Obszönität - omniszient - Oszillation - phosphoresziere - Plebiszit - Proszenium - Rekognoszierung - Rekonvaleszent - Szene - viszeral
Most of these actually are of latin origin. My favorite is obviously "Abszeß" - probably the only word in the german language that will show a non compounded co-existence of "sz" and "ß".
Nowadays it's written Abszess as the e is short.