The Collaborative International Dictionary of English v.0.48:

Roam \Roam\ (r[=o]m), v. i. [imp. & p. p. Roamed (r[=o]md); p.
   pr. & vb. n. Roaming.] [OE. romen, ramen; cf. AS.
   [=a]r[=ae]man to raise, rise, D. ramen to hit, plan, aim, OS.
   r[=o]m[=o]n to strive after, OHG. r[=a]men. But the word was
   probably influenced by Rome; cf. OF. romier a pilgrim,
   originally, a pilgrim going to Rome, It. romeo, Sp. romero.
   Cf. Ramble.]
   To go from place to place without any certain purpose or
   direction; to rove; to wander.
   [1913 Webster]

         He roameth to the carpenter's house.     --Chaucer.
   [1913 Webster]

         Daphne roaming through a thorny wood.    --Shak.
   [1913 Webster]

   Syn: To wander; rove; range; stroll; ramble.
        [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

54 Moby Thesaurus words for "roaming":
   Wanderjahr, afoot and lighthearted, bumming, circumforaneous,
   discursion, discursive, divagation, divagatory, drifting, errant,
   errantry, flitting, floating, footloose, footloose and fancy-free,
   fugitive, gadding, gypsy-like, gypsyish, hoboism, itineracy,
   itinerancy, landloping, meandering, migrational, migratory, nomad,
   nomadic, nomadism, peregrination, pererration, ramble, rambling,
   ranging, roam, rove, roving, shifting, straggling, straying,
   strolling, traipsing, transient, transitory, transmigratory,
   vagabond, vagabondage, vagabondia, vagabondism, vagrancy, vagrant,
   wandering, wanderlust, wayfaring