drink vs quaff

drink and quaff both are nouns.

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

As verbs, quaff is a hyponym of drink; that is, quaff is a word with a more specific, narrower meaning than drink:

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

drink (verb)	quaff (verb)
be fascinated or spell-bound by; pay close attention to	to swallow hurriedly or greedily or in one draught
take in liquids
consume alcohol
drink excessive amounts of alcohol; be an alcoholic
propose a toast to