candidacy vs effort

candidacy and effort both are nouns.

Word	Noun	Adjective	Verb	Adverb
candidacy	Yes	No	No	No
effort	Yes	No	No	No

As nouns, effort is a hypernym of candidacy; that is, effort is a word with a broader meaning than candidacy:

candidacy: the campaign of a candidate to be elected
effort: a series of actions advancing a principle or tending toward a particular end

Other hypernyms of candidacy include campaign, cause, crusade, drive, movement.

candidacy (noun)	effort (noun)
the campaign of a candidate to be elected	earnest and conscientious activity intended to do or accomplish something
	use of physical or mental energy; hard work
	a notable achievement
	a series of actions advancing a principle or tending toward a particular end