The Collaborative International Dictionary of English v.0.48:

Pebbly \Peb"bly\, a.
   Full of pebbles; pebbled. "A hard, pebbly bottom." --Johnson.
   [1913 Webster]

WordNet (r) 3.0 (2006):

pebbly
    adj 1: abounding in small stones; "landed at a shingly little
           beach" [syn: gravelly, pebbly, shingly]

Moby Thesaurus II by Grady Ward, 1.0:

31 Moby Thesaurus words for "pebbly":
   arenaceous, arenarious, breccial, brecciated, craggy, crystal,
   crystalline, grainy, granular, granulate, granulated, gravelly,
   gritty, lapideous, lithoid, lithoidal, monolithic, pebbled,
   porphyritic, rock-ribbed, rock-strewn, rock-studded, rocklike,
   rocky, sabulous, sandy, shingled, shingly, stonelike, stony,
   trachytic