demoralize vs poison

demoralize is not a noun while poison is a noun.

Word	Noun	Adjective	Verb	Adverb
demoralize	No	No	Yes	No
poison	Yes	No	Yes	No

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

demoralize (noun)	poison (noun)
	anything that harms or destroys
	any substance that causes injury or illness or death of a living organism

demoralize (verb)	poison (verb)
confuse or put into disorder	administer poison to
lower someone's spirits; make downhearted	add poison to
corrupt morally or by intemperance or sensuality	kill with poison
	kill by its poison
	spoil as if by poison