Piperaceae vs pepper family

Piperaceae and pepper family both are nouns.

Word	Noun	Adjective	Verb	Adverb
Piperaceae	Yes	No	No	No
pepper family	Yes	No	No	No

As nouns, Piperaceae and pepper family are synonyms defined as:

Piperaceae and pepper family: tropical woody vines and herbaceous plants having aromatic herbage and minute flowers in spikelets

Other synonyms of Piperaceae include family Piperaceae.

Piperaceae (noun)	pepper family (noun)
tropical woody vines and herbaceous plants having aromatic herbage and minute flowers in spikelets	tropical woody vines and herbaceous plants having aromatic herbage and minute flowers in spikelets