cardinal vs one

cardinal and one both are nouns.

Word	Noun	Adjective	Verb	Adverb
cardinal	Yes	Yes	No	No
one	Yes	Yes	No	No

cardinal (noun)	one (noun)
crested thick-billed North American finch having bright red plumage in the male	a single person or thing
a variable color averaging a vivid red	the smallest whole number or a numeral representing this number
(Roman Catholic Church) one of a group of more than 100 prominent bishops in the Sacred College who advise the Pope and elect new Popes
the number of elements in a mathematical set; denotes a quantity but not the order

cardinal (adjective)	one (adjective)
being or denoting a numerical quantity but not order	used of a single unit or thing; not two or more
serving as an essential component	being a single entity made by combining separate components
	(informal) very; used informally as an intensifier
	eminent beyond or above comparison
	indefinite in time or position
	of the same kind or quality
	having the indivisible character of a unit