effort vs candidacy

effort and candidacy both are nouns.

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

As nouns, candidacy is a hyponym of effort; that is, candidacy is a word with a more specific, narrower meaning than effort:

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

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