let the cat out of the bag vs blab

let the cat out of the bag and blab both are verbs.

Word	Noun	Adjective	Verb	Adverb
let the cat out of the bag	No	No	Yes	No
blab	No	No	Yes	No

As verbs, let the cat out of the bag and blab are synonyms defined as:

let the cat out of the bag and blab: divulge confidential information or secrets

Other synonyms of let the cat out of the bag include babble, babble out, blab out, peach, sing, spill the beans, talk, tattle.

let the cat out of the bag (verb)	blab (verb)
divulge confidential information or secrets	divulge confidential information or secrets
	speak (about unimportant matters) rapidly and incessantly