corn sugar vs glucose

corn sugar and glucose both are nouns.

Word	Noun	Adjective	Verb	Adverb
corn sugar	Yes	No	No	No
glucose	Yes	No	No	No

As nouns, glucose is a hypernym of corn sugar; that is, glucose is a word with a broader meaning than corn sugar:

corn sugar: dextrose made by hydrolysis of cornstarch
glucose: a monosaccharide sugar that has several forms; an important source of physiological energy

corn sugar (noun)	glucose (noun)
dextrose used as sweetening agent	a monosaccharide sugar that has several forms; an important source of physiological energy
dextrose made by hydrolysis of cornstarch