P. nigrum, black/white/green pepper
P. betle, betel
P. cubeba, cubeb
P. longum, long pepper
P. methysticum, kava
P. retrofractum, long pepper

Piper is a genus of plants containing the common table seasoning black pepper and the medicinal plant kava kava.

Piper also refers to The New Piper Aircraft company.

Piper is also a girl's given name, a surname of Scottish origin, and the title of one who plays the bagpipes.

Piper is also a name of a Swedish noble family.