sorghum vs Sorghum

sorghum and Sorghum both are nouns.

Word	Noun	Adjective	Verb	Adverb
sorghum	Yes	No	No	No
Sorghum	Yes	No	No	No

sorghum (noun)	Sorghum (noun)
made from juice of sweet sorghum	annual or perennial tropical and subtropical cereal grasses: sorghum
economically important Old World tropical cereal grass