liqueur vs intoxicant

liqueur and intoxicant both are nouns.

Word	Noun	Adjective	Verb	Adverb
liqueur	Yes	No	No	No
intoxicant	Yes	Yes	No	No

As nouns, intoxicant is a hypernym of liqueur; that is, intoxicant is a word with a broader meaning than liqueur:

Other hypernyms of liqueur include alcohol, alcoholic beverage, alcoholic drink, inebriant.

liqueur (noun)	intoxicant (noun)
strong highly flavored sweet liquor usually drunk after a meal	a drug that can produce a state of intoxication
	a liquor or brew containing alcohol as the active agent

liqueur (adjective)	intoxicant (adjective)
	causing intoxication