Lycopodiaceae vs fern family

Lycopodiaceae and fern family both are nouns.

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

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

Lycopodiaceae (noun)	fern family (noun)
a family of ferns belonging to the order Lycopodiales	families of ferns and fern allies