The Collaborative International Dictionary of English v.0.48:

Amble \Am"ble\, v. i. [imp. & p. p. Ambled; p. pr. & vb. n.
   Ambling.] [F. ambler to amble, fr. L. ambulare to walk, in
   LL., to amble, perh. fr. amb-, ambi-, and a root meaning to
   go: cf. Gr. ? to go, E. base. Cf. Ambulate.]
   1. To go at the easy gait called an amble; -- applied to the
      horse or to its rider.
      [1913 Webster]

   2. To move somewhat like an ambling horse; to go easily or
      without hard shocks.
      [1913 Webster]

            The skipping king, he ambled up and down. --Shak.
      [1913 Webster]

            Sir, your wit ambles well; it goes easily. --Shak.
      [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

79 Moby Thesaurus words for "ambling":
   ambulation, backpacking, cautious, circumspect, claudicant,
   crawling, creeping, creeping like snail, deliberate, easy,
   faltering, flagging, foot-dragging, footing, footing it, footwork,
   gentle, going on foot, gradual, halting, hiking, hitchhiking,
   hitching, hobbled, hobbling, hoofing, idle, indolent, languid,
   languorous, lazy, legwork, leisurely, limping, lumbering, marching,
   moderate, pedestrianism, perambulation, poking, poky, relaxed,
   reluctant, sauntering, shuffling, slack, slothful, slow,
   slow as death, slow as molasses, slow as slow, slow-crawling,
   slow-foot, slow-going, slow-legged, slow-moving, slow-paced,
   slow-poky, slow-running, slow-sailing, slow-stepped, sluggish,
   snail-paced, snaillike, staggering, strolling, tentative, thumbing,
   thumbing a ride, toddling, tortoiselike, tottering, tramping,
   treading, trudging, turtlelike, unhurried, waddling, walking