busker vs entertainer

busker and entertainer both are nouns.

Word	Noun	Adjective	Verb	Adverb
busker	Yes	No	No	No
entertainer	Yes	No	No	No

As nouns, entertainer is a hypernym of busker; that is, entertainer is a word with a broader meaning than busker:

busker: a person who entertains people for money in public places (as by singing or dancing), usually while asking for money
entertainer: a person who tries to please or amuse

busker (noun)	entertainer (noun)
a person who entertains people for money in public places (as by singing or dancing), usually while asking for money	a person who tries to please or amuse