oink vs let out

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

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

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

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

oink (noun)	let out (noun)
the short low gruff noise of the kind made by hogs

oink (verb)	let out (verb)
utter a high-pitched cry, characteristic of pigs	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