blither vs gabble

blither is not a noun while gabble is a noun.

Word	Noun	Adjective	Verb	Adverb
blither	No	No	Yes	No
gabble	Yes	No	Yes	No

As verbs, gabble is a hypernym of blither; that is, gabble is a word with a broader meaning than blither:

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

blither (noun)	gabble (noun)
	rapid and indistinct speech

blither (verb)	gabble (verb)
to talk foolishly	speak (about unimportant matters) rapidly and incessantly