palaver vs sweet-talk

palaver is a noun but sweet-talk is not a noun.

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

As verbs, palaver and sweet-talk are synonyms defined as:

palaver and sweet-talk: influence or urge by gentle urging, caressing, or flattering

Other synonyms of palaver include blarney, cajole, coax, inveigle, wheedle.

palaver (noun)	sweet-talk (noun)
loud and confused and empty talk
flattery intended to persuade

palaver (verb)	sweet-talk (verb)
have a lengthy discussion, usually between people of different backgrounds	influence or urge by gentle urging, caressing, or flattering
influence or urge by gentle urging, caressing, or flattering
speak (about unimportant matters) rapidly and incessantly