quadrivium vs liberal arts

quadrivium and liberal arts both are nouns.

Word	Noun	Adjective	Verb	Adverb
quadrivium	Yes	No	No	No
liberal arts	Yes	No	No	No

As nouns, liberal arts is a hypernym of quadrivium; that is, liberal arts is a word with a broader meaning than quadrivium:

quadrivium: (Middle Ages) a higher division of the curriculum in a medieval university involving arithmetic and music and geometry and astronomy
liberal arts: studies intended to provide general knowledge and intellectual skills (rather than occupational or professional skills)

Other hypernyms of quadrivium include arts, humanistic discipline, humanities.

quadrivium (noun)	liberal arts (noun)
(Middle Ages) a higher division of the curriculum in a medieval university involving arithmetic and music and geometry and astronomy	studies intended to provide general knowledge and intellectual skills (rather than occupational or professional skills)