palaver vs speak

palaver is a noun but speak is not a noun.

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

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

Other hypernyms of palaver include mouth, talk, utter, verbalise, verbalize.

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

palaver (verb)	speak (verb)
have a lengthy discussion, usually between people of different backgrounds	express in speech
influence or urge by gentle urging, caressing, or flattering	exchange thoughts; talk with
speak (about unimportant matters) rapidly and incessantly	use language
	give a speech to
	make a characteristic or natural sound