The Collaborative International Dictionary of English v.0.48:

Unsmooth \Unsmooth\
   See smooth.

WordNet (r) 3.0 (2006):

unsmooth
    adj 1: having or caused by an irregular surface; "trees with
           rough bark"; "rough ground"; "rough skin"; "rough
           blankets"; "his unsmooth face" [syn: rough, unsmooth]
           [ant: smooth]

Moby Thesaurus II by Grady Ward, 1.0:

45 Moby Thesaurus words for "unsmooth":
   asperous, broken, bumpy, choppy, coarse, coarse-grained,
   corrugated, craggy, cross-grained, grainy, granulated, harsh,
   homespun, horripilant, inequal, irregular, jagged, jolty,
   linsey-woolsey, pimply, pitted, pocky, potholed, rank, ripply,
   rough, rough-cast, rough-grained, rough-hewn, ruffled, rugged,
   rutted, rutty, scabrous, scraggy, shagged, shaggy, textured,
   uneven, unkempt, unlevel, unpolished, unrefined, ununiform,
   wimpled