Turnround and U-turn

Turnround noun - Act or process of unloading and loading and servicing a vessel or aircraft for a return trip.

U-turn and turnround are semantically related In some cases you can use "U-turn" instead a noun "Turnround".

U-turn noun - A changing from one policy or point of view to virtually its exact opposite.

Turnround and U-turn are semantically related in reversal topic. You can use "Turnround" instead a noun phrase "U-turn".