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

一芸[ichigei] an art
隠し芸[kakushigei] hidden talent
園芸[engei] horticulture
演芸[engei] entertainment
学芸[gakugei] arts and sciences

曲芸[kyokugei] acrobatics
曲芸師[kyokugeishi] acrobat
芸者[geisha] geisha
芸術[geijutsu] (fine) art
芸術家[geijutsuka] artist