Thelypteridaceae vs fern family

Thelypteridaceae and fern family both are nouns.

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

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

Thelypteridaceae (noun)	fern family (noun)
genera Thelypteris, Phegopteris, and others	families of ferns and fern allies