let on vs babble out

let on and babble out both are verbs.

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

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

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