ginger nut vs biscuit

ginger nut and biscuit both are nouns.

Word	Noun	Adjective	Verb	Adverb
ginger nut	Yes	No	No	No
biscuit	Yes	No	No	No

As nouns, biscuit is a hypernym of ginger nut; that is, biscuit is a word with a broader meaning than ginger nut:

Other hypernyms of ginger nut include cookie, cooky.

ginger nut (noun)	biscuit (noun)
a crisp round cookie flavored with ginger	small round bread leavened with baking-powder or soda
	any of various small flat sweet cakes