ご苦労様[gokurousama] thank you very much for your ...
御苦労さん[gokurousan] I appreciate your efforts
慰労[irou] recognition of services
過労[karou] overwork
過労死[karoushi] death from overwork and mental stress

気苦労[kigurou] worry
漁労[gyorou] fishing
共労者[kyourousha] coworker
勤労[kinrou] labor
勤労階級[kinroukaikyuu] salaried class

困らせる[komaraseru] to trouble with questions
困り果てる[komarihateru] to be greatly perplexed
困り者[komarimono] good-for-nothing
困り切る[komarikiru] to be greatly perplexed
困る[komaru] to be troubled

困窮[konkyuu] poverty
困苦[konku] privation
困難[konnan] difficulty
困惑[konwaku] bewilderment
困憊[konpai] exhaustion

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