Mawson, C.O.S., ed. (1870–1938). Roget’s International Thesaurus. 1922.

Class V. Words Releasing to the Voluntary Powers
Division (I) Individual Volition
Section III. Voluntary Action
1. Simple Voluntary Action

688. Fatigue.

   NOUN:FATIGUE; weariness [See Weariness]; yawning, drowsiness [See Inactivity]; lassitude, tiredness, fatigation [obs.], sweat.
  SHORTNESS OF BREATH; anhelation [rare], dyspnœa or dyspnea, panting, labored breathing.
  FAINTNESS, fainting, swoon, goneness, exhaustion, collapse, prostration, deliquium, syncope, lipothymy.
   VERB:BE FATIGUED &c. adj.; yawn (get sleepy) [See Inactivity]; droop, sink, flag; lose breath, lose wind; gasp, pant, puff, blow, drop, swoon, faint, succumb.
  FATIGUE, tire, bore, weary, irk [chiefly impersonal, as, it irks me], flag, jade, harass, exhaust, knock up, wear out, bleed white, prostrate.
  TAX, task, strain; overtask, overwork, overburden, overtax, overstrain, fag, fag out.
   ADJECTIVE:FATIGUED &c. v.; weary [See Weariness]; drowsy [See Inactivity]; drooping &c. v.; haggard; toilworn, wayworn; footsore, surbated [obs.], weather-beaten; faint; done, done up, used up, knocked up [all colloq.]; bushed [slang or dial., Amer.]; exhausted, prostrate, spent; overtired, overspent, overfatigued; unrefreshed, unrestored.
  ready to drop, all in [slang], more dead than alive, dog-weary, dog-tired, walked off one’s legs, tired to death, on one’s last legs, played out, hors de combat [F.].
  WORN, worn out; battered, shattered, pulled down, seedy [colloq.], enfeebled, altered.
  BREATHLESS, windless; short of -, out of -breath, – wind; blown, puffing and blowing; short-breathed; anhelose; broken-winded, short-winded; dyspnœal or dyspneal, dyspnœic or dyspneic.
  1. Weary and old with service.—Henry VIII
  2. The weariness, the fever, and the fret.—Keats
  3. When Ajax strives some rock’s vast weight to throw, The line too labours and the words move slow.—Pope