Irregularity

imperfection flaw roughness inconsistency variation change deviation bump dent hole distortion asymmetry shift bumpiness uncertainty break stop twist hump variability jaggedness spasm aberration

abnormality exception deviation anomaly oddity strangeness uniqueness singularity peculiarity characteristic quirk nonconformity eccentricity rarity malfunction malformation unorthodoxy innovation allowance exemption privilege dispensation looseness laxity excess unconformity