鬼利死丹[kirishitan] early Japanese Christianity (from the later Muromachi period)
あっ死[asshi] crushing to death
安楽死[anrakushi] euthanasia
一死[isshi] dying
一死後[isshigo] after one out (in Baseball)

一死報国[isshihoukoku] dying for one's country
煙死[enshi] death by smoke suffocation
横死[oushi] violent (tragic or accidental) death
仮死[kashi] asphyxiation
過労死[karoushi] death from overwork and mental stress

悪戦苦闘[akusenkutou] hard fighting
暗闘[antou] secret feud
階級闘争[kaikyuutousou] class struggle
挌闘[kakutou] hand-to-hand fighting
格闘戦部隊[kakutousenbutai] shock troops

敢闘[kantou] fighting bravely
共闘[kyoutou] joint struggle
苦闘[kutou] agonizing
激闘[gekitou] fierce fighting
決闘[kettou] duel