gibber vs piffle

gibber and piffle both are nouns.

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

As verbs, gibber and piffle are synonyms defined as:

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

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

gibber (noun)	piffle (noun)
unintelligible talking	trivial nonsense

gibber (verb)	piffle (verb)
speak (about unimportant matters) rapidly and incessantly	act in a trivial or ineffective way
chatter inarticulately; of monkeys	speak (about unimportant matters) rapidly and incessantly