honk vs let out

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

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

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

Other hypernyms of honk include emit, let loose, utter.

honk (noun)	let out (noun)
the cry of a goose (or any sound resembling this)

honk (verb)	let out (verb)
eject the contents of the stomach through the mouth	make (clothes) larger
cry like a goose	make known to the public information that was previously known only to a few people or that was meant to be kept a secret
use the horn of a car	express audibly; utter sounds (not necessarily words)
make a strident noise	bring out of a specific state