let out vs babble out

let out and babble out both are verbs.

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

As verbs, babble out is a hyponym of let out; that is, babble out is a word with a more specific, narrower meaning than let out:

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
babble out: divulge confidential information or secrets

let out (verb)	babble out (verb)
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