out vs let out

out is a noun but let out is not a noun.

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

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

out: reveal (something) about somebody's identity or lifestyle
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 out include break, bring out, disclose, discover, divulge, expose, give away, let on, reveal, uncover, unwrap.

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

out: to state openly and publicly one's homosexuality
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 out include break, bring out, disclose, discover, divulge, expose, give away, let on, reveal, uncover, unwrap.

out (noun)	let out (noun)
(baseball) a failure by a batter or runner to reach a base safely in baseball

out (adjective)	let out (adjective)
not allowed to continue to bat or run
being out or having grown cold
outside or external
excluded from use or mention
not worth considering as a possibility
outer or outlying
directed outward or serving to direct something outward
knocked unconscious by a heavy blow
no longer fashionable
out of power; especially having been unsuccessful in an election

out (verb)	let out (verb)
be made known; be disclosed or revealed	make (clothes) larger
reveal (something) about somebody's identity or lifestyle	make known to the public information that was previously known only to a few people or that was meant to be kept a secret
to state openly and publicly one's homosexuality	express audibly; utter sounds (not necessarily words)
	bring out of a specific state

out (adverb)	let out (adverb)
away from home
from one's possession
moving or appearing to move away from a place, especially one that is enclosed or hidden