tattle vs let out

tattle is a noun but let out is not a noun.

Word	Noun	Adjective	Verb	Adverb
tattle	Yes	No	Yes	No
let out	No	No	Yes	No

As verbs, let out is a hypernym of tattle; that is, let out is a word with a broader meaning than tattle:

tattle: divulge confidential information or secrets
let out: make known to the public information that was previously known only to a few people or that was meant to be kept a secret

Other hypernyms of tattle include break, bring out, disclose, discover, divulge, expose, give away, let on, reveal, uncover, unwrap.

tattle (noun)	let out (noun)
disclosing information or giving evidence about another

tattle (verb)	let out (verb)
speak (about unimportant matters) rapidly and incessantly	make (clothes) larger
divulge confidential information or secrets	make known to the public information that was previously known only to a few people or that was meant to be kept a secret
	express audibly; utter sounds (not necessarily words)
	bring out of a specific state