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

栖息[seisoku] inhabiting
隠栖[insei] secluded life
旧栖[kyuusei] old home
幽栖[yuusei] living a quiet life in seclusion away from the masses

栖む[sumu] to live (of animals)
羊栖菜[hijiki] hijiki (dark edible seaweed usu. sold in dried black strips; Hizikia fusiformis)
終の栖[tsuinosumika] one's final abode