browbeat vs palaver

browbeat is not a noun while palaver is a noun.

Word	Noun	Adjective	Verb	Adverb
browbeat	No	No	Yes	No
palaver	Yes	No	Yes	No

As verbs, palaver is a hypernym of browbeat; that is, palaver is a word with a broader meaning than browbeat:

browbeat: discourage or frighten with threats or a domineering manner; intimidate
palaver: influence or urge by gentle urging, caressing, or flattering

Other hypernyms of browbeat include blarney, cajole, coax, inveigle, sweet-talk, wheedle.

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

browbeat (verb)	palaver (verb)
discourage or frighten with threats or a domineering manner; intimidate	have a lengthy discussion, usually between people of different backgrounds
be bossy towards	influence or urge by gentle urging, caressing, or flattering
	speak (about unimportant matters) rapidly and incessantly