cankerous vs canker

cankerous is not a noun while canker is a noun.

Word	Noun	Adjective	Verb	Adverb
cankerous	No	Yes	No	No
canker	Yes	No	Yes	No

cankerous (noun)	canker (noun)
	a pernicious and malign influence that is hard to get rid of
	an ulceration (especially of the lips or lining of the mouth)
	a fungal disease of woody plants that causes localized damage to the bark

cankerous (adjective)	canker (adjective)
having an ulcer or canker

cankerous (verb)	canker (verb)
	infect with a canker
	become infected with a canker