order Polypodiales vs family Pteridaceae

order Polypodiales and family Pteridaceae both are nouns.

Word	Noun	Adjective	Verb	Adverb
order Polypodiales	Yes	No	No	No
family Pteridaceae	Yes	No	No	No

order Polypodiales (noun)	family Pteridaceae (noun)
true (leptosporangiate) ferns	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