Gleicheniaceae vs fern family

Gleicheniaceae and fern family both are nouns.

Word	Noun	Adjective	Verb	Adverb
Gleicheniaceae	Yes	No	No	No
fern family	Yes	No	No	No

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

Gleicheniaceae (noun)	fern family (noun)
a family of ferns belonging to order Filicales	families of ferns and fern allies