The Collaborative International Dictionary of English v.0.48:

Uneasiness \Un*eas"i*ness\, n.
   1. The quality or state of being uneasy; restlessness;
      disquietude; anxiety.
      [1913 Webster]

   2. The quality of making uneasy; discomfort; as, the
      uneasiness of the road. [Obs.] -- Bp. Burnet.
      [1913 Webster]

WordNet (r) 3.0 (2006):

uneasiness
    n 1: feelings of anxiety that make you tense and irritable [syn:
         edginess, uneasiness, inquietude, disquietude]
    2: physical discomfort (as mild sickness or depression) [syn:
       malaise, unease, uneasiness]
    3: embarrassment deriving from the feeling that others are
       critically aware of you [syn: self-consciousness,
       uneasiness, uncomfortableness]
    4: the trait of seeming ill at ease [syn: disquiet, unease,
       uneasiness]
    5: inability to rest or relax or be still [syn: restlessness,
       uneasiness, queasiness]

Moby Thesaurus II by Grady Ward, 1.0:

153 Moby Thesaurus words for "uneasiness":
   Faustianism, abashment, agitation, all-overs, angst, anguish,
   anxiety, anxiety hysteria, anxiety neurosis, anxious bench,
   anxious concern, anxious seat, anxiousness, apprehension,
   apprehensiveness, attack of nerves, boredom, breathless impatience,
   buck fever, cankerworm of care, care, case of nerves, chafing,
   cheerlessness, chills of fear, cold comfort, cold creeps,
   cold shivers, cold sweat, concern, concernment, confusion, creeps,
   disappointment, discomfiture, discomfort, discomposure,
   disconcertion, disconcertment, discontent, discontentedness,
   discontentment, disgruntlement, dislike, displeasure, disquiet,
   disquietude, dissatisfaction, dissatisfiedness, distress,
   disturbance, divine discontent, dread, dullness, eagerness,
   emptiness, ennui, envy, excessive irritability, excitement,
   existential woe, fear, fear and trembling, fidgetiness, fidgets,
   flatness, foreboding, forebodingness, fretfulness, fretting,
   goose bumps, gooseflesh, grimness, haste, heartquake,
   horripilation, ill humor, impatience, impatientness, impetuousness,
   inquietude, jimjams, joylessness, lack of pleasure, lather,
   malaise, misgiving, morbid excitability, nausea, nerves, nervosity,
   nervous stomach, nervous strain, nervous tension, nervousness,
   nongratification, nonsatisfaction, overanxiety, painfulness,
   palpitation, panic, panickiness, peevishness, perturbation,
   petulance, pins and needles, pucker, quaking, querulousness,
   quiver of terror, rebelliousness, resentment, restiveness,
   restlessness, savorlessness, shivers, solicitude, sourness,
   spell of nerves, spleen, stage fright, staleness, state of nerves,
   stew, strain, sulkiness, suspense, sweat, tastelessness,
   tediousness, tedium, tense readiness, tension, thrill of fear, tic,
   trepidation, trepidity, trouble, twitching, uncomfortableness,
   unease, unfulfillment, unhappiness, unpatientness, unpleasure,
   unquietness, unsatisfaction, upset, vellication, vexation,
   vexation of spirit, worry, zeal