major scale vs musical mode

major scale and musical mode both are nouns.

Word	Noun	Adjective	Verb	Adverb
major scale	Yes	No	No	No
musical mode	Yes	No	No	No

As nouns, musical mode is a hypernym of major scale; that is, musical mode is a word with a broader meaning than major scale:

major scale: a diatonic scale with notes separated by whole tones except for the 3rd and 4th and 7th and 8th
musical mode: any of various fixed orders of the various diatonic notes within an octave

Other hypernyms of major scale include mode.

major scale (noun)	musical mode (noun)
a diatonic scale with notes separated by whole tones except for the 3rd and 4th and 7th and 8th	any of various fixed orders of the various diatonic notes within an octave