olive vs genus Olea

olive and genus Olea both are nouns.

Word	Noun	Adjective	Verb	Adverb
olive	Yes	Yes	No	No
genus Olea	Yes	No	No	No

olive (noun)	genus Olea (noun)
a yellow-green color of low brightness and saturation	evergreen trees and shrubs having oily one-seeded fruits
one-seeded fruit of the European olive tree usually pickled and used as a relish
evergreen tree cultivated in the Mediterranean region since antiquity and now elsewhere; has edible shiny black fruits
small ovoid fruit of the European olive tree; important food and source of oil
hard yellow often variegated wood of an olive tree; used in cabinetwork

olive (adjective)	genus Olea (adjective)
of a yellow-green color similar to that of an unripe olive