northern snakehead vs class Channidae

northern snakehead and class Channidae both are nouns.

Word	Noun	Adjective	Verb	Adverb
northern snakehead	Yes	No	No	No
class Channidae	Yes	No	No	No

northern snakehead (noun)	class Channidae (noun)
a voracious freshwater fish that is native to northeastern China; can use fin to walk and can survive out of water for three days; a threat to American populations of fish	snakeheads