genus Acacia vs flame tree

genus Acacia and flame tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Acacia	Yes	No	No	No
flame tree	Yes	No	No	No

genus Acacia (noun)	flame tree (noun)
large genus of shrubs and trees and some woody vines of Central and South America, Africa, Australia and Polynesia: wattle; mimosa	south Australian tree having panicles of brilliant scarlet flowers
	north Australian tree having white flowers and broad leaves
	a terrestrial evergreen shrub or small tree of western Australia having brilliant yellow-orange flowers; parasitic on roots of grasses
	showy tropical tree or shrub native to Madagascar; widely planted in tropical regions for its immense racemes of scarlet and orange flowers; sometimes placed in genus Poinciana
	tropical American thorny shrub or small tree; fragrant yellow flowers used in making perfumery