pepper family vs Piperaceae

pepper family and Piperaceae both are nouns.

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

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

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

Other synonyms of pepper family include family Piperaceae.

pepper family (noun)	Piperaceae (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