どら息子[doramusuko] lazy son
愛息[aisoku] (your) beloved son
安息[ansoku] rest
一人息子[hitorimusuko] an only son
一息[hitoiki] one breath

因循姑息[injunkosoku] dilly-dallying and temporizing (temporising)
気息[kisoku] breathing
気息奄奄[kisokuenen] gasping for breath
休息[kyuusoku] rest
休息時間[kyuusokujikan] recess

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

窒扶斯[chifusu] typhoid fever
窒素[chisso] nitrogen (N)
窒息[chissoku] suffocation
窒息ガス[chissokugasu] choking gas
窒息死[chissokushi] death by suffocation

窒塞[chissoku] blocked
窒化物[chikkabutsu] nitride
窒素固定法[chissokoteihou] nitrogen fixation (method)
窒素固定[chissokotei] nitrogen fixation
窒素肥料[chissohiryou] nitrogenous fertilizer