Canteen and Refreshment room

Canteen noun - Sells food and personal items to personnel at an institution or school or camp etc..

Refreshment room and canteen are semantically related in buffet topic. In some cases you can use "Refreshment room" instead a noun "Canteen", when it comes to topics like snack bar, eatery.

Canteen and refreshment room are semantically related in buffet topic. You can use "Canteen" instead a noun phrase "Refreshment room", if it concerns topics such as snack bar, eatery.