upkeep vs repair

upkeep and repair both are nouns.

Word	Noun	Adjective	Verb	Adverb
upkeep	Yes	No	No	No
repair	Yes	No	Yes	No

As nouns, repair is a hypernym of upkeep; that is, repair is a word with a broader meaning than upkeep:

Other hypernyms of upkeep include fix, fixing, fixture, mend, mending, reparation.

upkeep (noun)	repair (noun)
activity involved in maintaining something in good working order	the act of putting something in working order again
the act of sustaining life by food or providing a means of subsistence	a frequently visited place
	a formal way of referring to the condition of something

upkeep (verb)	repair (verb)
	give new life or energy to
	restore by replacing a part or putting together what is torn or broken
	set straight or right
	move, travel, or proceed toward some place
	make amends for; pay compensation for