class Hydrozoa vs order Siphonophora

class Hydrozoa and order Siphonophora both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Hydrozoa	Yes	No	No	No
order Siphonophora	Yes	No	No	No

class Hydrozoa (noun)	order Siphonophora (noun)
coelenterates typically having alternation of generations; hydroid phase is usually colonial giving rise to the medusoid phase by budding: hydras and jellyfishes	marine colonial hydrozoans