keep up vs contend

keep up and contend both are verbs.

Word	Noun	Adjective	Verb	Adverb
keep up	No	No	Yes	No
contend	No	No	Yes	No

keep up (verb)	contend (verb)
prevent from going to bed at night	to make the subject of dispute, contention, or litigation
keep informed	have an argument about something
maintain a required pace or level	maintain or assert
keep in safety and protect from harm, decay, loss, or destruction	compete for something; engage in a contest; measure oneself against others
lengthen or extend in duration or space	be engaged in a fight; carry on a fight
	succeed in doing, achieving, or producing (something) with the limited or inadequate means available