Corbett vs Gentleman Jim

Corbett and Gentleman Jim both are nouns.

Word	Noun	Adjective	Verb	Adverb
Corbett	Yes	No	No	No
Gentleman Jim	Yes	No	No	No

As nouns, Corbett and Gentleman Jim are synonyms defined as:

Corbett and Gentleman Jim: United States heavyweight boxing champion (1866-1933)

Other synonyms of Corbett include James J. Corbett, James John Corbett, Jim Corbett.

Corbett (noun)	Gentleman Jim (noun)
United States heavyweight boxing champion (1866-1933)	United States heavyweight boxing champion (1866-1933)