blackwash vs let out

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

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

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

blackwash: bring (information) out of concealment
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 blackwash include break, bring out, disclose, discover, divulge, expose, give away, let on, reveal, uncover, unwrap.

blackwash (noun)	let out (noun)
a wash that colors a surface black
a mixture of calomel and limewater that is used on syphilitic sores
an attack intended to ruin someone's reputation

blackwash (verb)	let out (verb)
color with blackwash	make (clothes) larger
bring (information) out of concealment	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