Donjon and Upkeep

Donjon noun - The main tower within the walls of a medieval castle or fortress.

Upkeep and donjon are semantically related. In some cases you can use "Upkeep" instead a noun "Donjon".

Upkeep noun - The act or activity of keeping something in an existing and usually satisfactory condition.

Donjon and upkeep are semantically related. Sometimes you can use "Donjon" instead a noun "Upkeep".