WordNet (r) 3.0 (2006):

rooming house
    n 1: a house where rooms are rented [syn: lodging house,
         rooming house]

Moby Thesaurus II by Grady Ward, 1.0:

21 Moby Thesaurus words for "rooming house":
   boardinghouse, dorm, dormitory, doss house, fleabag, flophouse,
   guest house, hospice, hostel, hostelry, hotel, inn, lodging house,
   ordinary, pension, posada, pub, public, public house, roadhouse,
   tavern