family Dryopteridaceae vs Filicopsida

family Dryopteridaceae and Filicopsida both are nouns.

Word	Noun	Adjective	Verb	Adverb
family Dryopteridaceae	Yes	No	No	No
Filicopsida	Yes	No	No	No

family Dryopteridaceae (noun)	Filicopsida (noun)
alternative names for one of a number of families into which the family Polypodiaceae has been subdivided in some classification systems	ferns