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

シフト演算機構[shifutoenzankikou] shift arithmetic unit
一般命令演算機構[ippanmeireienzankikou] general instruction unit (computer)
演じる[enjiru] to perform (a play)
演ずる[enzuru] to perform
演歌[enka] enka

演戯[engi] drama
演技[engi] acting
演義[engi] expansion
演曲[enkyoku] musical program
演芸[engei] entertainment