maximum vs supreme

maximum is a noun but supreme is not a noun.

Word	Noun	Adjective	Verb	Adverb
maximum	Yes	Yes	No	No
supreme	No	Yes	No	No

maximum (noun)	supreme (noun)
the greatest possible degree
the point on a curve where the tangent changes from positive on the left to negative on the right
the largest possible quantity

maximum (adjective)	supreme (adjective)
the greatest or most complete or best possible	greatest in status or authority or power
	greatest or maximal in degree; extreme
	highest in excellence or achievement
	final or last in your life or progress