Pteridaceae vs order Filicales

Pteridaceae and order Filicales both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pteridaceae	Yes	No	No	No
order Filicales	Yes	No	No	No

Pteridaceae (noun)	order Filicales (noun)
one of a number of families into which the family Polypodiaceae has been subdivided in some classification systems; Pteridaceae is itself in turn sometimes further subdivided	true (leptosporangiate) ferns