Sir David Bruce vs David Bruce

Sir David Bruce and David Bruce both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sir David Bruce	Yes	No	No	No
David Bruce	Yes	No	No	No

As nouns, Sir David Bruce and David Bruce are synonyms defined as:

Sir David Bruce and David Bruce: Australian physician and bacteriologist who described the bacterium that causes undulant fever or brucellosis (1855-1931)

Other synonyms of Sir David Bruce include Bruce.

Sir David Bruce (noun)	David Bruce (noun)
Australian physician and bacteriologist who described the bacterium that causes undulant fever or brucellosis (1855-1931)	Australian physician and bacteriologist who described the bacterium that causes undulant fever or brucellosis (1855-1931)