The difference between Chaos and Cosmos

When used as nouns, chaos means a vast chasm or abyss, whereas cosmos means the universe.

check bellow for the other definitions of Chaos and Cosmos

Chaos as a noun (obsolete):

A vast chasm or abyss.
Chaos as a noun:

The unordered state of matter in classical accounts of cosmogony
Chaos as a noun:

Any state of disorder, any confused or amorphous mixture or conglomeration.

Examples:

"Disorder conveys chaos and makes one feel that no one is in charge.'' ― Max Roscoe, "How Your City Is Killing You With Ugliness"
Chaos as a noun (obsolete, rare):

A given medium; a space in which something exists or lives; an environment.
Chaos as a noun (mathematics):

Behaviour of iterative non-linear systems in which arbitrarily small variations in initial conditions become magnified over time.
Chaos as a noun (fantasy):

One of the two metaphysical forces of the world in some fantasy settings, as opposed to law.

Cosmos as a noun:

The universe.
Cosmos as a noun:

An ordered, harmonious whole.
Cosmos as a noun:

Any of various mostly Mexican herbs of the genus Cosmos having radiate heads of variously coloured flowers and pinnate leaves.