upper vs superior

upper and superior both are nouns.

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

upper (noun)	superior (noun)
piece of leather or synthetic material that forms the part of a shoe or boot above the sole that encases the foot	a character or symbol set or printed or written above and immediately to one side of another character
a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression	one of greater rank or station or quality
the higher of two berths	the head of a religious community
	a combatant who is able to defeat rivals

upper (adjective)	superior (adjective)
the topmost one of two; upper	written or printed above and to one side of another character
higher in place or position	of or characteristic of high rank or importance
superior in rank or accomplishment	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