phylum Cnidaria vs class Anthozoa

phylum Cnidaria and class Anthozoa both are nouns.

Word	Noun	Adjective	Verb	Adverb
phylum Cnidaria	Yes	No	No	No
class Anthozoa	Yes	No	No	No

phylum Cnidaria (noun)	class Anthozoa (noun)
hydras, polyps, jellyfishes, sea anemones, corals	a large class of sedentary marine coelenterates that includes sea anemones and corals; the medusoid phase is entirely suppressed