The Collaborative International Dictionary of English v.0.48:

boardinghouse \boardinghouse\ n.
   a private house that provides accommodations and meals for
   paying guests.

   Syn: boarding house.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

boardinghouse
    n 1: a private house that provides accommodations and meals for
         paying guests [syn: boarding house, boardinghouse]

Moby Thesaurus II by Grady Ward, 1.0:

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