| recurring(adjective, regular, irregular, routine, recurrent) |
| inconstant(adjective, anxious, irregular, unsettled, agitated) |
| unsystematic(adjective, irregular, unreliable, uneven, variable) |
| variable(adjective, adverb, rough, irregular, odd) |
| capricious(adjective, irregular, unpredictable, unreliable, changeable) |
| cyclical(adjective, irregular, sporadic, regularity of recurrence periodicity) |
| eccentric(adjective, irregular, unpredictable, unreliable, uneven) |
| episodic |
| seasonal(adjective, regular, limited, irregular, routine) |
| unsteady(adjective, rough, anxious, irregular, unsettled) |
| every other(expression, adjective, idiom, irregular, erratic) |
| frequent(adjective, common, regular, normal, recurrent) |
| isochronal(adjective, regular, irregular, routine, erratic) |
| isochronous(adjective, regular, irregular, routine, erratic) |
| iterative(adjective, irregular, sporadic) |
| jerky(adjective, rough, irregular, odd, unreliable) |
| rhythmic(adjective, irregular, sporadic) |
| serial(adjective, irregular, sporadic, regularity of recurrence periodicity) |
| spastic |
| alternating |