class Actinozoa vs Actiniaria

class Actinozoa and Actiniaria both are nouns.

Word	Noun	Adjective	Verb	Adverb
class Actinozoa	Yes	No	No	No
Actiniaria	Yes	No	No	No

class Actinozoa (noun)	Actiniaria (noun)
a large class of sedentary marine coelenterates that includes sea anemones and corals; the medusoid phase is entirely suppressed	sea anemones