campaigning vs candidacy

campaigning and candidacy both are nouns.

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

As nouns, campaigning and candidacy are synonyms defined as:

Other synonyms of campaigning include candidature, electioneering, political campaign.

campaigning (noun)	candidacy (noun)
the campaign of a candidate to be elected	the campaign of a candidate to be elected