calumniatory vs calumnious

calumniatory and calumnious both are adjectives.

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

As adjectives, calumniatory and calumnious are synonyms defined as:

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

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

calumniatory (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