カバー曲[kabaakyoku] remake of another artist's song (a "cover")
サイン曲線[sainkyokusen] sinusoid
愛唱曲[aishoukyoku] favourite song
委曲[ikyoku] details
一曲[ikkyoku] tune (melody, piece of music)

迂曲[ukyoku] meander
円曲[enkyoku] roundabout way (of speaking or working)
円錐曲線[ensuikyokusen] conic curve
円舞曲[enbukyoku] waltz (composition)
演曲[enkyoku] musical program

黄禍[kouka] Yellow Peril
禍因[kain] cause of trouble
禍害[kagai] evil
禍源[kagen] source of misfortune
禍根[kakon] root of evil

禍福[kafuku] weal and woe
豪雨禍[gouuka] flood devastation
災禍[saika] accident
惨禍[sanka] calamity