seventh vs musical interval

seventh and musical interval both are nouns.

Word	Noun	Adjective	Verb	Adverb
seventh	Yes	Yes	No	No
musical interval	Yes	No	No	No

As nouns, musical interval is a hypernym of seventh; that is, musical interval is a word with a broader meaning than seventh:

seventh: the musical interval between one note and another seven notes away from it
musical interval: the difference in pitch between two notes

Other hypernyms of seventh include interval.

seventh (noun)	musical interval (noun)
the musical interval between one note and another seven notes away from it	the difference in pitch between two notes
one part in seven equal parts
position seven in a countable series of things

seventh (adjective)	musical interval (adjective)
coming next after the sixth and just before the eighth in position