draught vs quaff

draught and quaff both are nouns.

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

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

draught (noun)	quaff (noun)
the act of moving a load by drawing or pulling	a hearty draft
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)

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