Potluck and Repast

Potluck noun - Whatever happens to be available especially when offered to an unexpected guest or when brought by guests and shared by all.

Repast and potluck are semantically related. in food topic. In some cases you can use "Repast" instead a noun "Potluck", when it comes to topics like evening meal.

Repast noun - Food eaten or prepared for eating at one time.

Potluck and repast are semantically related. You can use "Potluck" instead a noun "Repast".