repast vs supper

repast and supper both are nouns.

Word	Noun	Adjective	Verb	Adverb
repast	Yes	No	No	No
supper	Yes	No	No	No

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

repast: the food served and eaten at one time
supper: a light evening meal; served in early evening if dinner is at midday or served late in the evening at bedtime

repast (noun)	supper (noun)
the food served and eaten at one time	a light evening meal; served in early evening if dinner is at midday or served late in the evening at bedtime
	a social gathering where a light evening meal is served