calumniously vs slanderously

calumniously and slanderously both are adverbs.

Word	Noun	Adjective	Verb	Adverb
calumniously	No	No	No	Yes
slanderously	No	No	No	Yes

As adverbs, calumniously and slanderously are synonyms defined as:

calumniously and slanderously: in a false and slanderous and defamatory manner; with slander or calumny

calumniously (adverb)	slanderously (adverb)
in a false and slanderous and defamatory manner; with slander or calumny	in a false and slanderous and defamatory manner; with slander or calumny