To divide into catchment areas.
Any structure or land feature which catches and holds water; the collection of such water.
A catchment area, or the people it serves.
To build up a supply; to accumulate.
To accumulate or build up a supply of (something).
To build up a stock of (nuclear weapons).
To heap up piles of (coal or ore) on the ground after it has been mined.
A supply of nuclear weapons kept by a country; a nuclear stockpile.
A pile of coal or ore heaped up on the ground after it has been mined.
A supply (especially a large one) of something kept for future use, specifically in case the cost of the item increases or if there a shortage.