influence vs canker

influence and canker both are nouns.

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

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

Other hyponyms of influence include imponderable, imprint, morale builder, pestilence, support, enticement, temptation.

influence (noun)	canker (noun)
causing something without any direct or apparent effort	a pernicious and malign influence that is hard to get rid of
a power to affect persons or events especially power based on prestige etc	an ulceration (especially of the lips or lining of the mouth)
a cognitive factor that tends to have an effect on what you do	a fungal disease of woody plants that causes localized damage to the bark
one having power to influence another
the effect of one thing (or person) on another

influence (verb)	canker (verb)
shape or influence; give direction to	infect with a canker
induce into action by using one's charm	become infected with a canker
have and exert influence or effect