palaver vs soft-soap

palaver is a noun but soft-soap is not a noun.

Word	Noun	Adjective	Verb	Adverb
palaver	Yes	No	Yes	No
soft-soap	No	No	Yes	No

As verbs, soft-soap is a hyponym of palaver; that is, soft-soap is a word with a more specific, narrower meaning than palaver:

Other hyponyms of palaver include browbeat, bully, swagger.

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

palaver (verb)	soft-soap (verb)
have a lengthy discussion, usually between people of different backgrounds	use flattering talk on somebody
influence or urge by gentle urging, caressing, or flattering	persuade someone through flattery
speak (about unimportant matters) rapidly and incessantly