contend vs keep up

contend and keep up both are verbs.

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

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