sugar cane vs sugar cane

sugar cane and sugar cane both are nouns.

Word	Noun	Adjective	Verb	Adverb
sugar cane	Yes	No	No	No
sugar cane	Yes	No	No	No

sugar cane (noun)	sugar cane (noun)
tall tropical southeast Asian grass having stout fibrous jointed stalks; sap is a chief source of sugar	tall tropical southeast Asian grass having stout fibrous jointed stalks; sap is a chief source of sugar
juicy canes whose sap is a source of molasses and commercial sugar; fresh canes are sometimes chewed for the juice	juicy canes whose sap is a source of molasses and commercial sugar; fresh canes are sometimes chewed for the juice