stray

nouns

an animal that has strayed (especially a domestic animal)
stray
is a type of (narrower)
any of various animals that have been tamed and made fit for a human environment
domestic animal, domesticated animal

verbs

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"
cast, drift, ramble, range, roam, roll, rove, stray, swan, tramp, vagabond, wander
is derived from
strayer
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"
drift, err, stray
is derived from
strayer
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"
digress, divagate, stray, wander

adjectives

not close together in time
"isolated instances of rebellion"; "a few stray crumbs"
isolated, stray
(of an animal) having no home or having wandered away from home
"a stray calf"; "a stray dog"
stray
is similar to
no longer in your possession or control; unable to be found or recovered
"a lost child"; "lost friends"; "his lost book"; "lost opportunities"
lost