WordNet (r) 3.0 (2006):

skid row
    n 1: a city district frequented by vagrants and alcoholics and
         addicts

Moby Thesaurus II by Grady Ward, 1.0:

35 Moby Thesaurus words for "skid row":
   Bowery, Chinatown, East End, East Side, Little Hungary,
   Little Italy, West End, West Side, barrio, black ghetto,
   blighted area, bowery, business district, central city,
   city center, core, downtown, ghetto, greenbelt, inner city,
   midtown, outskirts, red-light district, residential district,
   run-down neighborhood, shopping center, skid road, slum, slums,
   suburbia, suburbs, tenderloin, tenement district, uptown,
   urban blight