neem vs genus Azadirachta

neem and genus Azadirachta both are nouns.

Word	Noun	Adjective	Verb	Adverb
neem	Yes	No	No	No
genus Azadirachta	Yes	No	No	No

neem (noun)	genus Azadirachta (noun)
large semi-evergreen tree of the East Indies; trunk exudes a tenacious gum; bitter bark used as a tonic; seeds yield an aromatic oil; sometimes placed in genus Melia	genus of large important East Indian trees: neem trees