sip vs drink

sip and drink both are nouns.

Word	Noun	Adjective	Verb	Adverb
sip	Yes	No	Yes	No
drink	Yes	No	Yes	No

As nouns, drink is a hypernym of sip; that is, drink is a word with a broader meaning than sip:

Other hypernyms of sip include deglutition, swallow.

As verbs, drink is a hypernym of sip; that is, drink is a word with a broader meaning than sip:

Other hypernyms of sip include imbibe.

sip (noun)	drink (noun)
a small drink	the act of drinking alcoholic beverages to excess
	the act of swallowing
	any liquid suitable for drinking
	a single serving of a beverage
	any large deep body of water

sip (verb)	drink (verb)
drink in sips	be fascinated or spell-bound by; pay close attention to
	take in liquids
	consume alcohol
	drink excessive amounts of alcohol; be an alcoholic
	propose a toast to