Synonyms For "Irregular" :

1 syllable:

rough, strong

2 syllables:

crooked, second, unsmooth

3 syllables:

casual, guerilla, guerrilla, illegal, improper, insurgent, maverick, randomised, randomized, sporadic, unlawful, unrhythmic, unsteady

4 syllables:

asymmetric, atypical, occasional, temporary, unorthodox, unrhythmical

5 syllables:

asymmetrical, unconventional, unpredictable, unsystematic