seventh vs ordinal

seventh and ordinal both are nouns.

Word	Noun	Adjective	Verb	Adverb
seventh	Yes	Yes	No	No
ordinal	Yes	Yes	No	No

seventh (noun)	ordinal (noun)
the musical interval between one note and another seven notes away from it	the number designating place in an ordered sequence
one part in seven equal parts
position seven in a countable series of things

seventh (adjective)	ordinal (adjective)
coming next after the sixth and just before the eighth in position	being or denoting a numerical order in a series
	of or relating to a taxonomic order