1) Aberration 2) Abnormality 3) Abnormity 4) Anomaly 5) Asymmetry 6) Constipation 7) Defect 8) Deformity 9) Deviation 10) Discrepancy 11) Disorder 12) Dyschezia 13) Fitfulness 14) Haphazardness 15) Inhomogeneity 16) Intermittence 17) Intermittency 18) Jerkiness 19) Malformation 20) Misdemeanour 21) Nonuniformity 1) Abnormality 2) An irregular spatial pattern 3) Asymmetry 4) At irregular intervals 5) Breach of a convention 6) Difference 7) French word used in English 8) Glitch 9) Incongruity 10) Inconsistency 11) Lop-sidedness 12) Misbehavior 13) Misbehaviour 14) Misdeed 15) Occasional mild constipation 16) Something irregular 
• (n.) The state or quality of being irregular; that which is irregular.
Ir·reg`u·lar'i·ty noun ; plural Irregularities . [ Confer French irrégularité .] The state or quality of being irregular; that which is irregular. 
[n] - an irregular asymmetry in shape 2. [n] - not characterized by a fixed principle or rate
noun an irregular asymmetry in shape; an irregular spatial patternunregularity noun not characterized by a fixed principle or rate; at irregular intervals
the quality or state of being irregular. · something irregular. · a breach of rules, customs, etiquette, morality, etc. · occasional mild constipation.