twaddle vs piffle

twaddle and piffle both are nouns.

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

As verbs, twaddle and piffle are synonyms defined as:

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

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

twaddle (noun)	piffle (noun)
pretentious or silly talk or writing	trivial nonsense

twaddle (verb)	piffle (verb)
speak (about unimportant matters) rapidly and incessantly	act in a trivial or ineffective way
	speak (about unimportant matters) rapidly and incessantly