ninth vs ordinal

ninth and ordinal both are nouns.

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

ninth (noun)	ordinal (noun)
one part in nine equal parts	the number designating place in an ordered sequence
position nine in a countable series of things

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