noun / verb
stash
STASH/stˈæʃ/
A supply kept out of sight for later use, or to store something this way.
The hidden box contains a stash of snacks.

Etymology
The noun grew from a slang verb meaning “conceal” or “hide,” naming the collection hidden away. That verb’s origin is unknown, though stow and cache may have suggested it.
In context
I think that's helpful because I have a very big stash so when I'm thinking about buying a pattern I'm usually thinking do I have something of my stash already