intoxicate vs poison

intoxicate is not a noun while poison is a noun.

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

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

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

intoxicate (verb)	poison (verb)
have an intoxicating effect on, of a drug	administer poison to
make drunk (with alcoholic drinks)	add poison to
fill with high spirits; fill with optimism	kill with poison
	kill by its poison
	spoil as if by poison