incoherent

As adjectives the difference between incoherent and discoherent

is that incoherent is lacking coherence or agreement; incongruous; inconsistent; not logically connected while discoherent is incoherent.

As an adjective incoherent

is incoherent (not coherent).

As a noun incoherency is

the quality of being incoherent; lack of coherence.

As an adjective incoherent

is lacking coherence or agreement; incongruous; inconsistent; not logically connected.

As a noun gibberer is

one who gibbers (talks rapidly and incoherently).