reserves
n. C / Un. extra supplies of something, like money, food, or energy, that you keep to use later if you need them. It can also mean a protected area of land for animals or plants.
n. supplies of a commodity or resource held in storage for future use or in case of emergency. Also refers to areas of land managed for the protection of wildlife or natural resources.
The country has large oil reserves to use during a crisis.
After the long hike, she felt she had used up all her physical reserves and needed to rest.
The central bank increased its foreign currency reserves to stabilize the national economy against sudden market fluctuations and speculative attacks.
Usually plural when referring to stored resources or funds; often singular when referring to a specific nature reserve.