blackwash vs defamation

blackwash and defamation both are nouns.

Word	Noun	Adjective	Verb	Adverb
blackwash	Yes	No	Yes	No
defamation	Yes	No	No	No

As nouns, defamation is a hypernym of blackwash; that is, defamation is a word with a broader meaning than blackwash:

blackwash: an attack intended to ruin someone's reputation
defamation: a false accusation of an offense or a malicious misrepresentation of someone's words or actions

Other hypernyms of blackwash include calumniation, calumny, hatchet job, obloquy, traducement.

blackwash (noun)	defamation (noun)
a wash that colors a surface black	an abusive attack on a person's character or good name
a mixture of calomel and limewater that is used on syphilitic sores	a false accusation of an offense or a malicious misrepresentation of someone's words or actions
an attack intended to ruin someone's reputation

blackwash (verb)	defamation (verb)
color with blackwash
bring (information) out of concealment