prate vs babble

prate and babble both are nouns.

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

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

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

prate (noun)	babble (noun)
idle or foolish and irrelevant talk	gibberish resembling the sounds of a baby

prate (verb)	babble (verb)
speak (about unimportant matters) rapidly and incessantly	to talk foolishly
	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