ginger snap vs biscuit

ginger snap and biscuit both are nouns.

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

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

Other hypernyms of ginger snap include cookie, cooky.

ginger snap (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