irregular

[1]	guerrilla , guerilla , insurgent
[2]	second

adj.

[1]	uneven , bumpy , lumpy , coarse , rough , unequal , unsymmetrical , asymmetric(al) , pitted , potholed , jagged , craggy , lopsided
[2]	sporadic , uneven , random , erratic , unequal , fitful , haphazard , unsystematic , unsystematized , disorderly , uncertain , unmethodical , occasional , casual
[3]	extraordinary , unusual , eccentric , abnormal , anomalous , aberrant , unnatural , peculiar , queer , odd , weird , bizarre , strange , singular , nonconforming , nonconformist , exceptional , unconventional , offbeat , uncommon , freakish , (Colloq) freaky
[4]	unpredictable
[5]	atypical
[6]	temporary
[7]	maverick , unorthodox