quaff vs draught

quaff and draught both are nouns.

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

As nouns, draught is a hypernym of quaff; that is, draught is a word with a broader meaning than quaff:

Other hypernyms of quaff include draft, potation, tipple.

quaff (noun)	draught (noun)
a hearty draft	the act of moving a load by drawing or pulling
	a large and hurried swallow
	a dose of liquid medicine
	the depth of a vessel's keel below the surface (especially when loaded)
	a serving of drink (usually alcoholic) drawn from a keg
	a current of air (usually coming into a chimney or room or vehicle)

quaff (verb)	draught (verb)
to swallow hurriedly or greedily or in one draught	make a blueprint of