blackwash vs obloquy

blackwash and obloquy both are nouns.

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

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

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

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

blackwash (noun)	obloquy (noun)
a wash that colors a surface black	a false accusation of an offense or a malicious misrepresentation of someone's words or actions
a mixture of calomel and limewater that is used on syphilitic sores	state of disgrace resulting from public abuse
an attack intended to ruin someone's reputation

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