afternoon tea vs repast

afternoon tea and repast both are nouns.

Word	Noun	Adjective	Verb	Adverb
afternoon tea	Yes	No	No	No
repast	Yes	No	No	No

As nouns, repast is a hypernym of afternoon tea; that is, repast is a word with a broader meaning than afternoon tea:

Other hypernyms of afternoon tea include meal.

afternoon tea (noun)	repast (noun)
a light midafternoon meal of tea and sandwiches or cakes	the food served and eaten at one time