keep up vs uphold

keep up and uphold both are verbs.

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

As verbs, uphold is a hypernym of keep up; that is, uphold is a word with a broader meaning than keep up:

Other hypernyms of keep up include bear on, carry on, continue, preserve.

keep up (verb)	uphold (verb)
prevent from going to bed at night	stand up for; stick up for; of causes, principles, or ideals
keep informed	support against an opponent
maintain a required pace or level	keep or maintain in unaltered condition; cause to remain or last
keep in safety and protect from harm, decay, loss, or destruction
lengthen or extend in duration or space