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

自己複製[jikofukusei] self-duplicating
重複保険[juufukuhoken] double insurance
単複[tanpuku] simplicity and complexity
複本[fukuhon] duplicate
複眼[fukugan] compound eyes

複合[fukugou] composite
複合語[fukugougo] compound word
複合媒体[fukugoubaitai] multimedia
複雑[fukuzatsu] complex
複雑さ[fukuzatsusa] complexity

阿諛追従[ayutsuishou] excessive flattery
位記追贈[ikitsuisou] conferment of posthumous rank
犬追物[inuoumono] dog-hunting event of Kamakura period
幻を追う[maboroshiwoou] to pursue an illusion
後追い[atooi] following someone

後追い自殺[atooijisatsu] following someone's example, and committing suicide
公職追放[koushokutsuihou] purge of public officials
鹿追[shikaoi] hinged bamboo water cup or trough, which makes a percussive sound periodically as it tips over
戦没者追悼記念日[senbotsushatsuitoukinenbi] Memorial Day (US)
訴追[sotsui] legal action