stockpile
A large saved-up supply kept for future use.
A stockpile is a large supply of something kept in reserve for future use. Countries stockpile emergency supplies like food, water, and medicine in case of natural disasters. Families might stockpile canned goods in their pantry. A squirrel stockpiles acorns for winter.
The word suggests careful planning and preparation: gathering extra beyond immediate needs for when you might need it later. During uncertain times, people might stockpile batteries, blankets, or other essentials. Factories stockpile raw materials so production doesn't stop if deliveries are delayed.
The word works as both a noun (the stockpile itself) and a verb (to stockpile). A military force might stockpile ammunition, while a baker might stockpile flour before a big holiday weekend. The practice of stockpiling shows up throughout history whenever people faced scarcity, uncertainty, or the need to prepare for difficult times ahead.