slander vs slanderous

slander is a noun but slanderous is not a noun.

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

slander (noun)	slanderous (noun)
an abusive attack on a person's character or good name
words falsely spoken that damage the reputation of another

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

slander (verb)	slanderous (verb)
charge falsely or with malicious intent; attack the good name and reputation of someone