obloquy vs defamation

obloquy and defamation both are nouns.

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

As nouns, obloquy and defamation are synonyms defined as:

obloquy and defamation: a false accusation of an offense or a malicious misrepresentation of someone's words or actions

Other synonyms of obloquy include calumniation, calumny, hatchet job, traducement.

obloquy (noun)	defamation (noun)
a false accusation of an offense or a malicious misrepresentation of someone's words or actions	an abusive attack on a person's character or good name
state of disgrace resulting from public abuse	a false accusation of an offense or a malicious misrepresentation of someone's words or actions