blather vs tittle-tattle

blather and tittle-tattle both are nouns.

Word	Noun	Adjective	Verb	Adverb
blather	Yes	No	Yes	No
tittle-tattle	Yes	No	Yes	No

As verbs, tittle-tattle is a hypernym of blather; that is, tittle-tattle is a word with a broader meaning than blather:

Other hypernyms of blather include blab, blabber, chatter, clack, gabble, gibber, maunder, palaver, piffle, prate, prattle, tattle, twaddle.

blather (noun)	tittle-tattle (noun)
foolish gibberish	light informal conversation for social occasions

blather (verb)	tittle-tattle (verb)
to talk foolishly	speak (about unimportant matters) rapidly and incessantly