hegari vs grain sorghum

hegari and grain sorghum both are nouns.

Word	Noun	Adjective	Verb	Adverb
hegari	Yes	No	No	No
grain sorghum	Yes	No	No	No

As nouns, grain sorghum is a hypernym of hegari; that is, grain sorghum is a word with a broader meaning than hegari:

hegari: Sudanese sorghums having white seeds; one variety grown in southwestern United States
grain sorghum: any of several sorghums cultivated primarily for grain

hegari (noun)	grain sorghum (noun)
Sudanese sorghums having white seeds; one variety grown in southwestern United States	any of several sorghums cultivated primarily for grain