壊す[kowasu] to break
壊れる[kowareru] to be broken
壊れ物[kowaremono] fragile article
壊血病[kaiketsubyou] scurvy
壊滅[kaimetsu] destruction

壊乱[kairan] corruption (of order, customs, etc.)
壊疽[eso] gangrene
偶像破壊[guuzouhakai] iconoclasm
決壊[kekkai] break (rip) down
原子破壊機[genshihakaiki] cyclotron

乾燥腐朽[kansoufukyuu] dry rot
朽ちる[kuchiru] to rot
朽果てる[kuchihateru] to rot away
不朽[fukyuu] everlasting
不朽の名作[fukyuunomeisaku] immortal work

腐朽[fukyuu] deterioration
老朽[roukyuu] superannuated
朽葉[kuchiba] decayed leaves
朽廃[kyuuhai] decay
朽木[kuchiki] decayed tree