ace vs superstar

ace and superstar both are nouns.

Word	Noun	Adjective	Verb	Adverb
ace	Yes	Yes	Yes	No
superstar	Yes	No	No	No

As nouns, ace and superstar are synonyms defined as:

Other synonyms of ace include adept, champion, genius, hotshot, maven, mavin, sensation, star, virtuoso, whiz, whizz, wiz, wizard.

ace (noun)	superstar (noun)
a serve that the receiver is unable to reach	someone who is dazzlingly skilled in any field
one of four playing cards in a deck having a single pip on its face
someone who is dazzlingly skilled in any field
the smallest whole number or a numeral representing this number

ace (adjective)	superstar (adjective)
of the highest quality