ace vs tennis

ace and tennis both are nouns.

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

ace (noun)	tennis (noun)
a serve that the receiver is unable to reach	a game played with rackets by two or four players who hit a ball back and forth over a net that divides the court
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)	tennis (adjective)
of the highest quality