The term 'Resource in the Board Game Catan' can be summarized as ORE, which is a three letter word. ORE is a resource used in the popular board game Catan, also known as Settlers of Catan. It is a strategic game where players build settlements, roads and cities on the island of Catan by trading resources such as ORE, wheat, brick and wood. ORE is one of the five resources available in the game and is used to build settlements and upgrade them to cities.