jongleur vs singer

jongleur and singer both are nouns.

Word	Noun	Adjective	Verb	Adverb
jongleur	Yes	No	No	No
singer	Yes	No	No	No

As nouns, singer is a hypernym of jongleur; that is, singer is a word with a broader meaning than jongleur:

Other hypernyms of jongleur include vocaliser, vocalist, vocalizer.

jongleur (noun)	singer (noun)
a singer of folk songs	a person who sings