sixth vs ordinal

sixth and ordinal both are nouns.

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

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

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