musical scale vs gamut

musical scale and gamut both are nouns.

Word	Noun	Adjective	Verb	Adverb
musical scale	Yes	No	No	No
gamut	Yes	No	No	No

As nouns, gamut is a hyponym of musical scale; that is, gamut is a word with a more specific, narrower meaning than musical scale:

musical scale: (music) a series of notes differing in pitch according to a specific scheme (usually within an octave)
gamut: the entire scale of musical notes

Other hyponyms of musical scale include diatonic scale, chromatic scale, gapped scale, blues scale, octatonic scale.

musical scale (noun)	gamut (noun)
(music) a series of notes differing in pitch according to a specific scheme (usually within an octave)	a complete extent or range:
	the entire scale of musical notes