eleventh vs ordinal

eleventh and ordinal both are nouns.

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

eleventh (noun)	ordinal (noun)
position 11 in a countable series of things	the number designating place in an ordered sequence

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