Piper nigrum vs common pepper

Piper nigrum and common pepper both are nouns.

Word	Noun	Adjective	Verb	Adverb
Piper nigrum	Yes	No	No	No
common pepper	Yes	No	No	No

As nouns, Piper nigrum and common pepper are synonyms defined as:

Piper nigrum and common pepper: climber having dark red berries (peppercorns) when fully ripe; southern India and Sri Lanka; naturalized in northern Burma and Assam

Other synonyms of Piper nigrum include black pepper, Madagascar pepper, pepper, white pepper.

Piper nigrum (noun)	common pepper (noun)
climber having dark red berries (peppercorns) when fully ripe; southern India and Sri Lanka; naturalized in northern Burma and Assam	climber having dark red berries (peppercorns) when fully ripe; southern India and Sri Lanka; naturalized in northern Burma and Assam