arsenal

An arsenal is a collection of weapons or tools, especially ones used for fighting.

Think about a big army getting ready for battle - they need guns, tanks, and other gear to fight effectively. An arsenal is like a huge storage room filled with all those things. It's also the place where soldiers can go to pick up their equipment before heading out into action. Some people might have a small personal arsenal at home, like a collection of self-defense tools or sports equipment.

Note: The word "arsenal" can sometimes be used figuratively, as in a person having an arsenal of arguments or ideas. In this case, it means they have many things to use against their opponents or for solving problems.