1) Anemia 2) Asthenopia 3) Drowsiness 4) Exhaustion 5) Eyestrain 6) Fatigue 7) Logginess 8) Loginess 9) Weariness 1) Apathy 2) Bleariness 3) Collapse 4) Disillusionment 5) Dizziness 6) Exhaustion 7) Faintness 8) Fatigue 9) Inertia 10) Lassitude 11) Lethargy 12) Overtiredness 13) Sleepiness 14) Temporary state 15) Unsteadiness 16) Weariness 17) Wooziness 
• (n.) The state of being tired, or weary.
Tired'ness noun The state of being tired, or weary. 
Tiredness: See: Tired.