genus Saururus vs lizard's-tail

genus Saururus and lizard's-tail both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Saururus	Yes	No	No	No
lizard's-tail	Yes	No	No	No

genus Saururus (noun)	lizard's-tail (noun)
type genus of the Saururaceae: lizard's-tails	North American herbaceous perennial of wet places having slender curled racemes of small white flowers