King vs Riley B King

King and Riley B King both are nouns.

Word	Noun	Adjective	Verb	Adverb
King	Yes	No	No	No
Riley B King	Yes	No	No	No

As nouns, King and Riley B King are synonyms defined as:

King and Riley B King: United States guitar player and singer of the blues (born in 1925)

Other synonyms of King include B. B. King.

King (noun)	Riley B King (noun)
United States charismatic civil rights leader and Baptist minister who campaigned against the segregation of Blacks (1929-1968)	United States guitar player and singer of the blues (born in 1925)
United States guitar player and singer of the blues (born in 1925)
United States woman tennis player (born in 1943)