ordinal vs fifth

ordinal and fifth both are nouns.

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

ordinal (noun)	fifth (noun)
the number designating place in an ordered sequence	the musical interval between one note and another five notes away from it
	one part in five equal parts
	a quantity of liquor equal to one fifth of a United States gallon
	position five in a countable series of things

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