倦憊[kenpai] extreme fatigue
困憊[konpai] exhaustion
疲労困憊[hiroukonpai] total exhaustion

熱疲憊[netsuhihai] heat exhaustion
疲憊[hihai] exhaustion

御疲れ様[otsukaresama] thank you
看護疲れ[kangotsukare] nursing fatigue
看病疲れ[kanbyouzukare] nursing fatigue
気疲れ[kizukare] mental fatigue
倦み疲れる[umitsukareru] to grow weary

疲らす[tsukarasu] to tire
疲れ[tsukare] tiredness
疲れる[tsukareru] to get tired
疲れ果て[tsukarehate] being tired out
疲れ果てる[tsukarehateru] to get tired out