biscuit vs kiss

biscuit and kiss both are nouns.

Word	Noun	Adjective	Verb	Adverb
biscuit	Yes	No	No	No
kiss	Yes	No	Yes	No

As nouns, kiss is a hyponym of biscuit; that is, kiss is a word with a more specific, narrower meaning than biscuit:

biscuit (noun)	kiss (noun)
small round bread leavened with baking-powder or soda	the act of caressing with the lips (or an instance thereof)
any of various small flat sweet cakes	a light glancing touch
	any of several bite-sized candies
	a cookie made of egg whites and sugar

biscuit (verb)	kiss (verb)
	touch with the lips or press the lips (against someone's mouth or other body part) as an expression of love, greeting, etc.
	touch lightly or gently