same vs one

same is not a noun while one is a noun.

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

same (noun)	one (noun)
	a single person or thing
	the smallest whole number or a numeral representing this number

same (adjective)	one (adjective)
closely similar or comparable in kind or quality or quantity or degree	used of a single unit or thing; not two or more
same in identity	being a single entity made by combining separate components
equal in amount or value	(informal) very; used informally as an intensifier
unchanged in character or nature	eminent beyond or above comparison
	indefinite in time or position
	of the same kind or quality
	having the indivisible character of a unit