challenger vs competition

challenger and competition both are nouns.

Word	Noun	Adjective	Verb	Adverb
challenger	Yes	No	No	No
competition	Yes	No	No	No

As nouns, challenger and competition are synonyms defined as:

Other synonyms of challenger include competitor, contender, rival.

challenger (noun)	competition (noun)
the contestant you hope to defeat	the act of competing as for profit or a prize
	an occasion on which a winner is selected from among two or more contestants
	the contestant you hope to defeat
	a business relation in which two parties compete to gain customers