prattle vs gibber

prattle and gibber both are nouns.

Word	Noun	Adjective	Verb	Adverb
prattle	Yes	No	Yes	No
gibber	Yes	No	Yes	No

As verbs, prattle and gibber are synonyms defined as:

prattle and gibber: speak (about unimportant matters) rapidly and incessantly

Other synonyms of prattle include blab, blabber, chatter, clack, gabble, maunder, palaver, piffle, prate, tattle, tittle-tattle, twaddle.

prattle (noun)	gibber (noun)
idle or foolish and irrelevant talk	unintelligible talking

prattle (verb)	gibber (verb)
speak (about unimportant matters) rapidly and incessantly	speak (about unimportant matters) rapidly and incessantly
	chatter inarticulately; of monkeys