slanderous vs calumnious

slanderous and calumnious both are adjectives.

Word	Noun	Adjective	Verb	Adverb
slanderous	No	Yes	No	No
calumnious	No	Yes	No	No

As adjectives, slanderous and calumnious are synonyms defined as:

slanderous and calumnious: (used of statements) harmful and often untrue; tending to discredit or malign

Other synonyms of slanderous include calumniatory, defamatory, denigrating, denigrative, denigratory, libellous, libelous.

slanderous (adjective)	calumnious (adjective)
(used of statements) harmful and often untrue; tending to discredit or malign	(used of statements) harmful and often untrue; tending to discredit or malign