break into vs let out

break into and let out both are verbs.

Word	Noun	Adjective	Verb	Adverb
break into	No	No	Yes	No
let out	No	No	Yes	No

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

Other hypernyms of break into include emit, let loose, utter.

break into (verb)	let out (verb)
change pace	make (clothes) larger
express or utter spontaneously	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