twelfth vs ordinal

twelfth and ordinal both are nouns.

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

twelfth (noun)	ordinal (noun)
one part in twelve equal parts	the number designating place in an ordered sequence
position 12 in a countable series of things

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