sugarloaf vs refined sugar

sugarloaf and refined sugar both are nouns.

Word	Noun	Adjective	Verb	Adverb
sugarloaf	Yes	No	No	No
refined sugar	Yes	No	No	No

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

sugarloaf: a large conical loaf of concentrated refined sugar
refined sugar: a white crystalline carbohydrate used as a sweetener and preservative

Other hypernyms of sugarloaf include loaf, sugar.

sugarloaf (noun)	refined sugar (noun)
a large conical loaf of concentrated refined sugar	a white crystalline carbohydrate used as a sweetener and preservative