sicken vs canker

sicken is not a noun while canker is a noun.

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

As verbs, canker is a hyponym of sicken; that is, canker is a word with a more specific, narrower meaning than sicken:

Other hyponyms of sicken include wan, contract, get, take.

sicken (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

sicken (verb)	canker (verb)
get sick	infect with a canker
make sick or ill	become infected with a canker
cause aversion in; offend the moral sense of
upset and make nauseated