genus Melicoccus vs Spanish lime tree

genus Melicoccus and Spanish lime tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Melicoccus	Yes	No	No	No
Spanish lime tree	Yes	No	No	No

genus Melicoccus (noun)	Spanish lime tree (noun)
tropical American trees and shrubs bearing berries	tropical American tree bearing a small edible fruit with green leathery skin and sweet juicy translucent pulp