is a specific kind of: music.

is a broader term that covers: fanfare, flourish, tucket | glissando | roulade | leitmotif, leitmotiv | theme song | signature, signature tune, theme song | idea, melodic theme, musical theme, theme | part, voice.

has as a part: musical phrase, phrase.

derivation: melodise, melodize | melodic, melodious, musical | melodious, tuneful.