contention vs competition

contention and competition both are nouns.

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

As nouns, contention and competition are synonyms defined as:

contention and competition: the act of competing as for profit or a prize

Other synonyms of contention include rivalry.

contention (noun)	competition (noun)
the act of competing as for profit or a prize	the act of competing as for profit or a prize
a contentious speech act; a dispute where there is strong disagreement	an occasion on which a winner is selected from among two or more contestants
a point asserted as part of an argument	the contestant you hope to defeat
	a business relation in which two parties compete to gain customers