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

悪路[akuro] bad road
闇路[yamiji] dark road
一日路[ichinichiji] day's journey
一路[ichiro] one road
迂路[uro] detour

沿路[enro] route
遠路[enro] long road
往路[ouro] outward journey
家路[ieji] the road home
回り路[mawarimichi] detour