WordNet (r) 3.0 (2006):

displaced person
    n 1: a person forced to flee from home or country [syn:
         displaced person, DP, stateless person]

Moby Thesaurus II by Grady Ward, 1.0:

59 Moby Thesaurus words for "displaced person":
   DP, Ishmael, Uitlander, absconder, alien, barbarian, bolter,
   castaway, declasse, deported population, deportee, deracine,
   derelict, eloper, emigrant, emigre, escapee, evacue, evacuee,
   evictee, exile, expatriate, expellee, fleer, foreign devil,
   foreigner, fugitive, gringo, immigrant, in-migrant, leper, migrant,
   migrator, migratory worker, out-migrant, outcast,
   outcast of society, outcaste, outlander, outlaw, outsider, pariah,
   persona non grata, refugee, runagate, runaway, skedaddler,
   social outcast, stateless person, stranger, the Wandering Jew,
   tramontane, trekker, ultramontane, unacceptable person,
   undesirable, untouchable, wanderer, wetback