axiom (ak´së-üm) n.
1. A self-evident or universally recognized truth; a maxim.
2. An established rule, principle, or law.
3. Abbr. ax. A self-evident principle or one that is accepted as true without proof as the basis for argument; a postulate.
There are only 2 differences between junk and stuff:
Stuff is the junk you keep,
Junk is the stuff you throw out.