S: (v) roll, wander, swan, stray, tramp, roam, cast, ramble, rove, range, drift, vagabond (move about aimlessly or without any destination, often in search of food or employment) "The gypsies roamed the woods"; "roving vagabonds"; "the wandering Jew"; "The cattle roam across the prairie"; "the laborers drift from one town to the next"; "They rolled from town to town"
S: (v) travel, go, move, locomote (change location; move, travel, or proceed, also metaphorically) "How fast does your new car go?"; "We travelled from Rome to Naples by bus"; "The policemen went from door to door looking for the suspect"; "The soldiers moved towards the city in an attempt to take it before night fell"; "news travelled fast"
S: (v) stray, err, drift (wander from a direct course or at random) "The child strayed from the path and her parents lost sight of her"; "don't drift from the set course"
S: (v) digress, stray, divagate, wander (lose clarity or turn aside especially from the main subject of attention or course of argument in writing, thinking, or speaking) "She always digresses when telling a story"; "her mind wanders"; "Don't digress when you give a lecture"
Adjective
S: (adj) isolated, stray (not close together in time) "isolated instances of rebellion"; "a few stray crumbs"
S: (adj) stray ((of an animal) having no home or having wandered away from home) "a stray calf"; "a stray dog"