Buster Keaton vs Keaton

Buster Keaton and Keaton both are nouns.

Word	Noun	Adjective	Verb	Adverb
Buster Keaton	Yes	No	No	No
Keaton	Yes	No	No	No

As nouns, Buster Keaton and Keaton are synonyms defined as:

Buster Keaton and Keaton: United States comedian and actor in silent films noted for his acrobatic skills and deadpan face (1895-1966)

Other synonyms of Buster Keaton include Joseph Francis Keaton.

Buster Keaton (noun)	Keaton (noun)
United States comedian and actor in silent films noted for his acrobatic skills and deadpan face (1895-1966)	United States comedian and actor in silent films noted for his acrobatic skills and deadpan face (1895-1966)