unneeded vs superfluous

unneeded and superfluous both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unneeded	No	Yes	No	No
superfluous	No	Yes	No	No

unneeded (adjective)	superfluous (adjective)
not necessary	more than is needed, desired, or required
	serving no useful purpose; having no excuse for being