tittle-tattle vs blab

tittle-tattle is a noun but blab is not a noun.

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

As verbs, tittle-tattle and blab are synonyms defined as:

tittle-tattle and blab: speak (about unimportant matters) rapidly and incessantly

Other synonyms of tittle-tattle include blabber, chatter, clack, gabble, gibber, maunder, palaver, piffle, prate, prattle, tattle, twaddle.

tittle-tattle (noun)	blab (noun)
light informal conversation for social occasions

tittle-tattle (verb)	blab (verb)
speak (about unimportant matters) rapidly and incessantly	divulge confidential information or secrets
	speak (about unimportant matters) rapidly and incessantly