contend vs contention

contend is not a noun while contention is a noun.

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

contend (noun)	contention (noun)
	the act of competing as for profit or a prize
	a contentious speech act; a dispute where there is strong disagreement
	a point asserted as part of an argument

contend (verb)	contention (verb)
to make the subject of dispute, contention, or litigation
have an argument about something
maintain or assert
compete for something; engage in a contest; measure oneself against others
be engaged in a fight; carry on a fight
succeed in doing, achieving, or producing (something) with the limited or inadequate means available