meal vs repast

meal and repast both are nouns.

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

As nouns, meal and repast are synonyms defined as:

meal (noun)	repast (noun)
the food served and eaten at one time	the food served and eaten at one time
coarsely ground foodstuff; especially seeds of various cereal grasses or pulse
any of the occasions for eating food that occur by custom or habit at more or less fixed times