major diatonic scale vs major scale

major diatonic scale and major scale both are nouns.

Word	Noun	Adjective	Verb	Adverb
major diatonic scale	Yes	No	No	No
major scale	Yes	No	No	No

As nouns, major diatonic scale and major scale are synonyms defined as:

major diatonic scale and major scale: a diatonic scale with notes separated by whole tones except for the 3rd and 4th and 7th and 8th

major diatonic scale (noun)	major scale (noun)
a diatonic scale with notes separated by whole tones except for the 3rd and 4th and 7th and 8th	a diatonic scale with notes separated by whole tones except for the 3rd and 4th and 7th and 8th