persuade vs sweet-talk

persuade and sweet-talk both are verbs.

Word	Noun	Adjective	Verb	Adverb
persuade	No	No	Yes	No
sweet-talk	No	No	Yes	No

As verbs, sweet-talk is a hyponym of persuade; that is, sweet-talk is a word with a more specific, narrower meaning than persuade:

persuade: cause somebody to adopt a certain position, belief, or course of action; twist somebody's arm
sweet-talk: influence or urge by gentle urging, caressing, or flattering

persuade (verb)	sweet-talk (verb)
cause somebody to adopt a certain position, belief, or course of action; twist somebody's arm	influence or urge by gentle urging, caressing, or flattering
win approval or support for