Synonyms for Unsmooth:

adj.

craggy (adjective)
rocky, scabrous, rough, rugged, broken, cragged, stony.
jagged (adjective)
craggy.
rough (adjective)
scabrous.
rugged (adjective)
hilly, mountainous.
scabrous (adjective)
scabby, lepidote, scaly.
uneven (adjective)
bumpy.

n.

unsmooth (noun)
jolting, hilly, crushed, stony, broken, rough-textured, textured, puckered, corduroy, lined, scratchy, bumpy, imbricated, lepidote, chapped, leprose, twilled, scaly, rugose, pocked, squamulose, rocky, roughish, scurfy, homespun, slubbed, pockmarked, wartlike, alligatored, sandpapery, cracked, imbricate, bullate, twill, jarring, tweedy, scabby, craggy, jolty, warty, barky, bouldered, nubby, seamed, shagged, mountainous, verrucose, potholed, costate, roughened, pique, scabrous, nubbly, rough, log, rugged, shaggy, abrasive, corded, bouldery, cragged.

Other synonyms:

Other relevant words:
broken.