gibber vs prate

gibber and prate both are nouns.

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

As verbs, gibber and prate are synonyms defined as:

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

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

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

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