Lord Macaulay vs First Baron Macaulay

Lord Macaulay and First Baron Macaulay both are nouns.

Word	Noun	Adjective	Verb	Adverb
Lord Macaulay	Yes	No	No	No
First Baron Macaulay	Yes	No	No	No

As nouns, Lord Macaulay and First Baron Macaulay are synonyms defined as:

Lord Macaulay and First Baron Macaulay: English historian noted for his history of England (1800-1859)

Other synonyms of Lord Macaulay include Macaulay, Thomas Babington Macaulay.

Lord Macaulay (noun)	First Baron Macaulay (noun)
English historian noted for his history of England (1800-1859)	English historian noted for his history of England (1800-1859)