vagrant
noun
the old car was a welcome shelter for the occasional vagrant:
tramp, drifter, down-and-out, derelict, beggar, itinerant, wanderer, nomad, wayfarer, traveler, gypsy, rover, vagabond, transient, migrant, homeless person, beachcomber, person of no fixed address/abode, knight of the road, bird of passage, rolling stone;
North American hobo;
Australian bagman, knockabout, overlander, sundowner, whaler;
New Zealand streety;
informal bag lady;
North American, informal bum, bindlestiff;
South African, informal outie;
Australian, New Zealand, informal derro.
adjective
the Council provides facilities for vagrant alcoholics:
homeless, drifting, transient, roving, roaming, floating, unsettled, footloose, itinerant, wandering, nomadic, traveling, ambulatory, mobile, on the move, journeying, rambling, touring, vagabond, migrant, migrating, migratory, rootless;
of no fixed address/abode;
archaic errant.