let the cat out of the bag vs tattle

let the cat out of the bag is not a noun while tattle is a noun.

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

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

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

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

let the cat out of the bag (noun)	tattle (noun)
	disclosing information or giving evidence about another

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