prate vs gibber

prate and gibber both are nouns.

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

As verbs, prate and gibber are synonyms defined as:

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

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

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

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