WordNet (r) 3.0 (2006):

nubby
    adj 1: of textiles; having a rough surface; "a sweater knitted
           of nubbly homespun yarns" [syn: homespun(p), nubby,
           nubbly, slubbed, tweedy]

Moby Thesaurus II by Grady Ward, 1.0:

28 Moby Thesaurus words for "nubby":
   burled, gnarled, gnarly, knobbed, knobby, knoblike, knotted,
   knotty, knurled, knurly, nappy, nodal, noded, nodiform, nodular,
   nodulated, noduled, nubbled, nubbly, pily, pitted, shaggy, studded,
   torose, tubercular, tuberculous, tuberose, tuberous