weariness -
temporary loss of strength and energy resulting from hard physical or mental work; "he was hospitalized for extreme fatigue"; "growing fatigue was apparent from the decline in the execution of their athletic skills"; "weariness overcame her after twelve hours and she fell asleep"
jet lag fatigue and sleep disturbance resulting from disruption of the body's normal circadian rhythm as a result of jet travel
exhaustion the act of exhausting something entirely
grogginess marginal consciousness; "his grogginess was caused as much by exhaustion as by the blows"; "someone stole his wallet while he was in a drunken stupor"
