blackwash vs give away

blackwash is a noun but give away is not a noun.

Word	Noun	Adjective	Verb	Adverb
blackwash	Yes	No	Yes	No
give away	No	No	Yes	No

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

blackwash: bring (information) out of concealment
give away: 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, let on, let out, reveal, uncover, unwrap.

blackwash (noun)	give away (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)	give away (verb)
color with blackwash	make known to the public information that was previously known only to a few people or that was meant to be kept a secret
bring (information) out of concealment	give away information about somebody
	make a gift of
	formally hand over to the bridegroom in marriage; of a bride by her father