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

隔絶[kakuzetsu] isolation
気絶[kizetsu] faint
拒絶[kyozetsu] refusal
拒絶反応[kyozetsuhannou] (organ) rejection
空前絶後[kuuzenzetsugo] (so marvelous or horrible that it may be) the first and probably the last

懸絶[kenzetsu] great difference
根絶[konzetsu] eradication
謝絶[shazetsu] refusal
絶えず[taezu] constantly
絶える[taeru] to die out