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

峡湾[kyouwan] fjord
港湾[kouwan] harbours
港湾労働者[kouwanroudousha] longshoreman
真珠湾[shinjuwan] Pearl Harbor
台湾[taiwan] Taiwan

台湾海峡[taiwankaikyou] Straits of Taiwan
台湾人[taiwanjin] a Taiwanese
東京湾[toukyouwan] Tokyo Bay
岬湾[kouwan] indentations