一心不乱[isshinfuran] wholeheartedly
淫乱[inran] debauched
潰乱[kairan] corruption (of order, customs, etc.)
快刀乱麻[kaitouranma] solving a problem swiftly and skillfully
怪力乱神[kairyokuranshin] supernatural things

外乱[gairan] noise (interference)
狂乱[kyouran] fury
胡乱[uron] suspicious looking
混乱[konran] disorder
咲乱れる[sakimidareru] to bloom in profusion

サンプリング周波数[sanpuringushuuhasuu] sampling frequency
波蘭[poorando] Poland
マイクロ波[maikuroha] microwave
ミリ波[miriha] milli-wave
圧力波[atsuryokuha] pressure wave

伊呂波[iroha] traditional ordering of the Japanese syllabary
浦波[uranami] (seaside) breakers
横波[yokonami] side (transverse) wave
音波[onpa] sound wave
寒波[kanpa] cold wave

波瀾万丈[haranbanjou] stormy and full of drama
波瀾[haran] troubles
狂瀾[kyouran] raging waves

狂瀾怒涛[kyourandotou] maelstrom
波瀾曲折[harankyokusetsu] very involved and troublesome situation