mismatched, inharmonious, discordant or dissonant, not fitting well together (especially in regards to aesthetics, colors, clothing, or sounds)
conflicting, contrasting, or contrary; inconsonant, incompatible, or irreconcilable
adverse or antagonistic; disagreeing or opposing
Producing a clash or series of clashes.
A clash; the sound or action of clashing; violent collision.
So much better than another as to be beyond comparison; matchless or unsurpassed.
Not able to be compared.
Something beyond compare; a thing with which there is no comparison.