Groucho Marx vs Groucho

Groucho Marx and Groucho both are nouns.

Word	Noun	Adjective	Verb	Adverb
Groucho Marx	Yes	No	No	No
Groucho	Yes	No	No	No

As nouns, Groucho Marx and Groucho are synonyms defined as:

Groucho Marx and Groucho: United States comedian; one of four brothers who made motion pictures together (1890-1977)

Other synonyms of Groucho Marx include Julius Marx, Marx.

Groucho Marx (noun)	Groucho (noun)
United States comedian; one of four brothers who made motion pictures together (1890-1977)	United States comedian; one of four brothers who made motion pictures together (1890-1977)