class Hexapoda vs order Dictyoptera

class Hexapoda and order Dictyoptera both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Hexapoda	Yes	No	No	No
order Dictyoptera	Yes	No	No	No

class Hexapoda (noun)	order Dictyoptera (noun)
insects; about five-sixths of all known animal species	in some classifications replaced by the orders (here suborders) Blattodea (cockroaches) and Manteodea (mantids); in former classifications often subsumed under a much broader order Orthoptera