The Collaborative International Dictionary of English v.0.48:

cramped \cramped\ adj.
   inconveniently small; restricting movement; -- of living
   quarters or workspace; as, cramped quarters; a cramped
   office.

   Syn: constricted, inconvenient, uncomfortably small.
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

Cramp \Cramp\, v. t. [imp. & p. p. Cramped (kr[a^]mt; 215); p.
   pr. & vb. n. Cramping.]
   1. To compress; to restrain from free action; to confine and
      contract; to hinder.
      [1913 Webster]

            The mind my be as much cramped by too much knowledge
            as by ignorance.                      --Layard.
      [1913 Webster]

   2. To fasten or hold with, or as with, a cramp.
      [1913 Webster]

   3. Hence, to bind together; to unite.
      [1913 Webster]

            The . . . fabric of universal justic is well cramped
            and bolted together in all its parts. --Burke.
      [1913 Webster]

   4. To form on a cramp; as, to cramp boot legs.
      [1913 Webster]

   5. To afflict with cramp.
      [1913 Webster]

            When the gout cramps my joints.       --Ford.
      [1913 Webster]

   To cramp the wheels of wagon, to turn the front wheels out
      of line with the hind wheels, so that one of them shall be
      against the body of the wagon.
      [1913 Webster]

WordNet (r) 3.0 (2006):

cramped
    adj 1: constricted in size; "cramped quarters"; "trying to bring
           children up in cramped high-rise apartments"

Moby Thesaurus II by Grady Ward, 1.0:

173 Moby Thesaurus words for "cramped":
   Latinate, angustifoliate, angustirostrate, angustisellate,
   angustiseptal, authoritarian, awkward, barred, beleaguered, beset,
   besieged, bigot, bigoted, blockaded, bombastic, borne, bound,
   bounded, boxed in, cabined, caged, circumscribed, clamped,
   cloistered, close, close-fitting, closed, closed-in, compressed,
   concentrated, condensed, conditioned, confined, consolidated,
   constricted, contracted, cooped, copyrighted, cordoned,
   cordoned off, corralled, cramp, creedbound, cribbed, crowded,
   cumbrous, deaf, deaf to reason, dinky, disciplined, elephantine,
   enclosed, exiguous, fanatical, fenced, finite, forced, formal,
   guinde, half-pint, halting, heavy, hedged, hedged about, hedged in,
   hemmed, hemmed in, hidebound, icebound, illiberal, immured,
   imprisoned, incapacious, incarcerated, incommodious, inkhorn,
   insular, isthmian, isthmic, jailed, knee-high, knitted, labored,
   landlocked, leaden, leaguered, limited, little, little-minded,
   lumbering, meager, mean, mean-minded, mean-spirited, mewed, minute,
   moderated, narrow, narrow-hearted, narrow-minded, narrow-souled,
   narrow-spirited, near, nearsighted, nipped, one-horse, paled,
   parochial, patented, penned, pent-up, petite, petty, piddling,
   pinched, pinched-in, pindling, pint-sized, poky, pompous,
   ponderous, prescribed, proscribed, provincial, puckered, puny,
   purblind, pursed, qualified, quarantined, railed, restrained,
   restricted, scant, scanty, sesquipedalian, short, shortsighted,
   shut-in, slender, slight, small, small-minded, smallish, snowbound,
   solidified, squeezed, stiff, stilted, stinted, strait, straitened,
   straitlaced, strangled, strangulated, stuffy, tight, tiny, turgid,
   two-by-four, uncatholic, uncharitable, uncomfortable, ungenerous,
   unliberal, unwieldy, walled, walled-in, wasp-waisted, windbound,
   wrinkled, ,