poison vs demoralize

poison is a noun but demoralize is not a noun.

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

As verbs, demoralize is a hypernym of poison; that is, demoralize is a word with a broader meaning than poison:

Other hypernyms of poison include corrupt, debase, debauch, demoralise, deprave, misdirect, pervert, profane, subvert, vitiate.

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

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