ordinal number vs ordinal

ordinal number and ordinal both are nouns.

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

As nouns, ordinal number and ordinal are synonyms defined as:

ordinal number and ordinal: the number designating place in an ordered sequence

Other synonyms of ordinal number include no..

ordinal number (noun)	ordinal (noun)
the number designating place in an ordered sequence	the number designating place in an ordered sequence

ordinal number (adjective)	ordinal (adjective)
	being or denoting a numerical order in a series
	of or relating to a taxonomic order