Synonyms for irregularity

noun

1. Unevenness

   roughness, bumpiness, jaggedness, stop, break, uncertainty, aberration, shift, change, twist, bump, hump, flaw, imperfection, dent, hole, variation, variability, spasm, deviation, inconsistency, distortion, asymmetry; see also roughness 1, variation 1, 2.

2. Something that is irregular

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

   Antonyms custom*, regularity, rule.

3. A suspicious or illegal occurrence

   breach, infringement, violation; see crime 1, sin, violation 1.