glissando vs melodic phrase

glissando and melodic phrase both are nouns.

Word	Noun	Adjective	Verb	Adverb
glissando	Yes	No	No	Yes
melodic phrase	Yes	No	No	No

As nouns, melodic phrase is a hypernym of glissando; that is, melodic phrase is a word with a broader meaning than glissando:

glissando: a rapid series of ascending or descending notes on the musical scale
melodic phrase: a succession of notes forming a distinctive sequence

Other hypernyms of glissando include air, line, melodic line, melody, strain, tune.

glissando (noun)	melodic phrase (noun)
a rapid series of ascending or descending notes on the musical scale	a succession of notes forming a distinctive sequence

glissando (adverb)	melodic phrase (adverb)
(musical direction) in the manner of a glissando (with a rapidly executed series of notes)