contention vs contend

contention is a noun but contend is not a noun.

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

contention (noun)	contend (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

contention (verb)	contend (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