piperin vs common pepper

piperin and common pepper both are nouns.

Word	Noun	Adjective	Verb	Adverb
piperin	Yes	No	No	No
common pepper	Yes	No	No	No

piperin (noun)	common pepper (noun)
derived from pepper (especially black pepper); source of the hotness of black and white pepper	climber having dark red berries (peppercorns) when fully ripe; southern India and Sri Lanka; naturalized in northern Burma and Assam