tut-tut vs let out

tut-tut and let out both are verbs.

Word	Noun	Adjective	Verb	Adverb
tut-tut	No	No	Yes	No
let out	No	No	Yes	No

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

Other hypernyms of tut-tut include emit, let loose, utter.

tut-tut (verb)	let out (verb)
utter `tsk,' `tut,' or `tut-tut,' as in disapproval	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