Jerusalem thorn vs genus Acacia

Jerusalem thorn and genus Acacia both are nouns.

Word	Noun	Adjective	Verb	Adverb
Jerusalem thorn	Yes	No	No	No
genus Acacia	Yes	No	No	No

Jerusalem thorn (noun)	genus Acacia (noun)
large shrub or shrubby tree having sharp spines and pinnate leaves with small deciduous leaflets and sweet-scented racemose yellow-orange flowers; grown as ornamentals or hedging or emergency food for livestock; tropical America but naturalized in southern United States	large genus of shrubs and trees and some woody vines of Central and South America, Africa, Australia and Polynesia: wattle; mimosa
spiny tree having dark red edible fruits
thorny Eurasian shrub with dry woody winged fruit
East Indian spiny tree having twice-pinnate leaves and yellow flowers followed by flat pods; source of black catechu