The Collaborative International Dictionary of English v.0.48:

Inhabitant \In*hab"it*ant\, n. [L. inhabitans, -antis, p. pr. of
   inhabitare.]
   [1913 Webster]
   1. One who dwells or resides permanently in a place, as
      distinguished from a transient lodger or visitor; as, an
      inhabitant of a house, a town, a city, county, or state.
      "Frail inhabitants of earth." --Cowper.
      [1913 Webster]

            In this place, they report that they saw inhabitants
            which were very fair and fat people.  --Abp. Abbot.
      [1913 Webster]

   2. (Law) One who has a legal settlement in a town, city, or
      parish; a permanent resident.
      [1913 Webster]

WordNet (r) 3.0 (2006):

inhabitant
    n 1: a person who inhabits a particular place [syn:
         inhabitant, habitant, dweller, denizen,
         indweller]

Moby Thesaurus II by Grady Ward, 1.0:

48 Moby Thesaurus words for "inhabitant":
   aborigine, addressee, artist-in-residence, autochthon, citizen,
   citizenry, commonwealth, community, constituency,
   cultural community, denizen, dweller, dwellers, folk,
   general public, habitancy, habitant, house detective, incumbent,
   indigene, inhabitants, inhabiter, inmate, inpatient, intern,
   linguistic community, live-in maid, liver, locum tenens, nation,
   native, occupant, occupier, people, people at large, populace,
   population, public, residencer, resident, resident physician,
   residentiary, resider, society, sojourner, speech community,
   tenant, whole people