Synonyms for Arrhythmic:

adj.

all (adjective)
jerking, jerky.

n.

arrhythmic (noun)
jerking, unrhythmic, unrhythmical, unsteady, irregular, arrhythmical, jerky.

Other synonyms:

n.
arrhythmical, jerking, jerky, unsteady.
n. t.
arrhythmical, jerking, jerky, unrhythmic, unrhythmical, unsteady.