canvassing vs persuasion

canvassing and persuasion both are nouns.

Word	Noun	Adjective	Verb	Adverb
canvassing	Yes	No	No	No
persuasion	Yes	No	No	No

As nouns, persuasion is a hypernym of canvassing; that is, persuasion is a word with a broader meaning than canvassing:

canvassing: persuasion of voters in a political campaign
persuasion: the act of persuading (or attempting to persuade); communication intended to induce belief or action

Other hypernyms of canvassing include suasion.

canvassing (noun)	persuasion (noun)
persuasion of voters in a political campaign	a personal belief or judgment that is not founded on proof or certainty
	the act of persuading (or attempting to persuade); communication intended to induce belief or action