babble vs maunder

babble is a noun but maunder is not a noun.

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

As verbs, maunder is a hypernym of babble; that is, maunder is a word with a broader meaning than babble:

Other hypernyms of babble include blab, blabber, chatter, clack, gabble, gibber, palaver, piffle, prate, prattle, tattle, tittle-tattle, twaddle.

babble (noun)	maunder (noun)
gibberish resembling the sounds of a baby

babble (verb)	maunder (verb)
to talk foolishly	talk indistinctly; usually in a low voice
divulge confidential information or secrets	speak (about unimportant matters) rapidly and incessantly
utter meaningless sounds, like a baby, or utter in an incoherent way	wander aimlessly
flow in an irregular current with a bubbling noise