blab vs palaver

blab is not a noun while palaver is a noun.

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

As verbs, blab and palaver are synonyms defined as:

blab and palaver: speak (about unimportant matters) rapidly and incessantly

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

blab (verb)	palaver (verb)
divulge confidential information or secrets	have a lengthy discussion, usually between people of different backgrounds
speak (about unimportant matters) rapidly and incessantly	influence or urge by gentle urging, caressing, or flattering
	speak (about unimportant matters) rapidly and incessantly