peach liqueur vs liqueur

peach liqueur and liqueur both are nouns.

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

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

peach liqueur: any of a variety of strong alcoholic liqueurs made from peaches.
liqueur: strong highly flavored sweet liquor usually drunk after a meal

Other hypernyms of peach liqueur include cordial.

peach liqueur (noun)	liqueur (noun)
any of a variety of strong alcoholic liqueurs made from peaches.	strong highly flavored sweet liquor usually drunk after a meal