descant
[noun]
Synonyms: melody, air, diapason, lay, measure, melisma, melodia, strain, tune, warble, song, aria, ditty, hymn, lied
[verb]
Synonyms: discourse, dilate (on or upon), discuss, dissert, dissertate, expatiate, sermonize

[TahlilGaran] English Synonym Dictionary ▲

des‧cant /ˈdeskænt/ noun [uncountable and countable]
[Date: 1300-1400; Language: Old North French; Origin: Latin cantus 'song']
a tune that is played or sung above the main tune in a piece of music

[TahlilGaran] Dictionary of Contemporary English ▲