sweet sorghum vs sugar sorghum

sweet sorghum and sugar sorghum both are nouns.

Word	Noun	Adjective	Verb	Adverb
sweet sorghum	Yes	No	No	No
sugar sorghum	Yes	No	No	No

As nouns, sweet sorghum and sugar sorghum are synonyms defined as:

sweet sorghum and sugar sorghum: any of several sorghums cultivated as a source of syrup

Other synonyms of sweet sorghum include sorgho, sorgo.

sweet sorghum (noun)	sugar sorghum (noun)
any of several sorghums cultivated as a source of syrup	any of several sorghums cultivated as a source of syrup