blether vs palaver

blether and palaver both are nouns.

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

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

Other hypernyms of blether include blab, blabber, chatter, clack, gabble, gibber, maunder, piffle, prate, prattle, tattle, tittle-tattle, twaddle.

blether (noun)	palaver (noun)
idle or foolish and irrelevant talk	loud and confused and empty talk
	flattery intended to persuade

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