ordinal vs ninth

ordinal and ninth both are nouns.

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

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

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