Rhamnaceae vs buckthorn family

Rhamnaceae and buckthorn family both are nouns.

Word	Noun	Adjective	Verb	Adverb
Rhamnaceae	Yes	No	No	No
buckthorn family	Yes	No	No	No

As nouns, Rhamnaceae and buckthorn family are synonyms defined as:

Rhamnaceae and buckthorn family: trees and shrubs usually thorny bearing drupaceous fruit many having medicinal value

Other synonyms of Rhamnaceae include family Rhamnaceae.

Rhamnaceae (noun)	buckthorn family (noun)
trees and shrubs usually thorny bearing drupaceous fruit many having medicinal value	trees and shrubs usually thorny bearing drupaceous fruit many having medicinal value