Gnetaceae vs gymnosperm family

Gnetaceae and gymnosperm family both are nouns.

Word	Noun	Adjective	Verb	Adverb
Gnetaceae	Yes	No	No	No
gymnosperm family	Yes	No	No	No

As nouns, gymnosperm family is a hypernym of Gnetaceae; that is, gymnosperm family is a word with a broader meaning than Gnetaceae:

Gnetaceae: plants having small unisexual flowers and fleshy or winged fruit: in some classifications includes the genera Ephedra and Welwitschia as well as genus Gnetum
gymnosperm family: a family of gymnosperms

Gnetaceae (noun)	gymnosperm family (noun)
plants having small unisexual flowers and fleshy or winged fruit: in some classifications includes the genera Ephedra and Welwitschia as well as genus Gnetum	a family of gymnosperms