the quality or state of being irregular.

something irregular.

a breach of rules, customs, etiquette, morality, etc.

occasional mild constipation.

noun

custom , regularity , rule

noun

roughness , bumpiness , jaggedness , stop , break , uncertainty , aberration , shift , change , twist , bump , hump , flaw , imperfection , dent , hole , variation , variability , spasm , deviation , inconsistency , distortion , asymmetry , peculiarity , singularity , anomaly , abnormality , strangeness , uniqueness , exception , excess , unorthodoxy , malfunction , malformation , dispensation , allowance , exemption , privilege , nonconformity , unconformity , innovation , oddity , eccentricity , rarity , looseness , laxity , characteristic , quirk , breach , infringement , violation , crime , crookedness , inequality , unevenness , aberrance , aberrancy , deviance , deviancy , preternaturalness , unnaturalness , arrhythmia , helter-skelter , illegality , inconformableness , intermittency , intermittently , occasionally , periodically