candidacy vs campaigning

candidacy and campaigning both are nouns.

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

As nouns, candidacy and campaigning are synonyms defined as:

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

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