class Filicopsida vs Dryopteridaceae

class Filicopsida and Dryopteridaceae both are nouns.

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

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