Dryopteridaceae vs class Filicopsida

Dryopteridaceae and class Filicopsida both are nouns.

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

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