genus Copernicia vs carnauba

genus Copernicia and carnauba both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Copernicia	Yes	No	No	No
carnauba	Yes	No	No	No

genus Copernicia (noun)	carnauba (noun)
slow-growing tropical fan palms	Brazilian fan palm having an edible root; source of a useful leaf fiber and a brittle yellowish wax
	hard yellowish to brownish wax from leaves of the carnauba palm used especially in floor waxes and polishes