stumping vs campaigning

stumping and campaigning both are nouns.

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

As nouns, campaigning is a hypernym of stumping; that is, campaigning is a word with a broader meaning than stumping:

stumping: campaigning for something by making political speeches (stump speeches)
campaigning: the campaign of a candidate to be elected

Other hypernyms of stumping include candidacy, candidature, electioneering, political campaign.

stumping (noun)	campaigning (noun)
campaigning for something by making political speeches (stump speeches)	the campaign of a candidate to be elected