piffle vs babble

piffle and babble both are nouns.

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

As verbs, babble is a hyponym of piffle; that is, babble is a word with a more specific, narrower meaning than piffle:

Other hyponyms of piffle include blather, blether, blither, smatter.

piffle (noun)	babble (noun)
trivial nonsense	gibberish resembling the sounds of a baby

piffle (verb)	babble (verb)
act in a trivial or ineffective way	to talk foolishly
speak (about unimportant matters) rapidly and incessantly	divulge confidential information or secrets
	utter meaningless sounds, like a baby, or utter in an incoherent way
	flow in an irregular current with a bubbling noise