class Chlorophyceae vs order oedogoniales

class Chlorophyceae and order oedogoniales both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Chlorophyceae	Yes	No	No	No
order oedogoniales	Yes	No	No	No

class Chlorophyceae (noun)	order oedogoniales (noun)
algae distinguished chiefly by having flagella and a clear green color, their chlorophyll being masked little if at all by other pigments	simple or branched filamentous freshwater green algae