premium vs superior

premium and superior both are nouns.

Word	Noun	Adjective	Verb	Adverb
premium	Yes	Yes	No	No
superior	Yes	Yes	No	No

premium (noun)	superior (noun)
the amount that something in scarce supply is valued above its nominal value	a character or symbol set or printed or written above and immediately to one side of another character
payment or reward (especially from a government) for acts such as catching criminals or killing predatory animals or enlisting in the military	one of greater rank or station or quality
payment for insurance	the head of a religious community
a fee charged for exchanging currencies	a combatant who is able to defeat rivals
a prize, bonus, or award given as an inducement to purchase products, enter competitions initiated by business interests, etc.

premium (adjective)	superior (adjective)
having or reflecting superior quality or value; having a higher price or cost	written or printed above and to one side of another character
	of or characteristic of high rank or importance
	of high or superior quality or performance
	having an orbit farther from the sun than the Earth's orbit
	(sometimes followed by `to') not subject to or influenced by
	having a higher rank
	(often followed by `to') above being affected or influenced by