persuasion vs weapon

persuasion and weapon both are nouns.

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

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

persuasion: the act of persuading (or attempting to persuade); communication intended to induce belief or action
weapon: a means of persuading or arguing

persuasion (noun)	weapon (noun)
a personal belief or judgment that is not founded on proof or certainty	any instrument or instrumentality used in fighting or hunting
the act of persuading (or attempting to persuade); communication intended to induce belief or action	a means of persuading or arguing