babble out vs let out

babble out and let out both are verbs.

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

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

babble out: 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 babble out include break, bring out, disclose, discover, divulge, expose, give away, let on, reveal, uncover, unwrap.

babble out (verb)	let out (verb)
divulge confidential information or secrets	make (clothes) larger
	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