Fainting

CIDE DICTIONARY

Fainting, n. 

 Syncope, or loss of consciousness owing to a sudden arrest of the blood supply to the brain, the face becoming pallid, the respiration feeble, and the heat's beat weak.  [1913 Webster]

Fainting fit, a fainting or swoon; syncope. [Colloq.]

ROGET THESAURUS

Fainting

Fatigue

N fatigue, weariness, yawning, drowsiness, lassitude, tiredness, fatigation, exhaustion, sweat, dyspnoea, anhelation, shortness of breath, faintness, collapse, prostration, swoon, fainting, deliquium, syncope, lipothymy, goneness, fatigued, tired, weary, drowsy, drooping, haggard, toilworn, wayworn:, footsore, surbated, weather-beaten, faint, done up, used up, knocked up, bushed, exhausted, prostrate, spent, overtired, overspent, overfatigued, unrefreshed, unrestored, worn, worn out, battered, shattered, pulled down, seedy, altered, breathless, windless, short of breath, out of breath, short of wind, blown, puffing and blowing, short-breathed, anhelose, broken winded, short-winded, dyspnaeal, dyspnaeic, ready to drop, all in, more dead than alive, dog-weary, walked off one's legs, tired to death, on one's last legs, played out, hors de combat, fatiguing, tiresome, irksome, wearisome, weary, trying.