Bonney vs Billie the Kid

Bonney and Billie the Kid both are nouns.

Word	Noun	Adjective	Verb	Adverb
Bonney	Yes	No	No	No
Billie the Kid	Yes	No	No	No

As nouns, Bonney and Billie the Kid are synonyms defined as:

Bonney and Billie the Kid: United States outlaw who was said to have killed 21 men (1859-1881)

Other synonyms of Bonney include Billy the Kid, William H. Bonney.

Bonney (noun)	Billie the Kid (noun)
United States outlaw who was said to have killed 21 men (1859-1881)	United States outlaw who was said to have killed 21 men (1859-1881)