"pepper-box, pepper-caster," said to be more common in Britain than in U.S., 1670s, from pepper (n.) + pot (n.1). As the name of a West Indian dish or stew involving pepper and other spices, by 1690s.
peppercorn
pepperidge
pepper-mill
peppermint
pepperoni
pepper-pot
peppery
peppy
Pepsi-Cola
pepsin
peptic