Francis Drake vs Sir Francis Drake

Francis Drake and Sir Francis Drake both are nouns.

Word	Noun	Adjective	Verb	Adverb
Francis Drake	Yes	No	No	No
Sir Francis Drake	Yes	No	No	No

As nouns, Francis Drake and Sir Francis Drake are synonyms defined as:

Francis Drake and Sir Francis Drake: English explorer and admiral who was the first Englishman to circumnavigate the globe and who helped to defeat the Spanish Armada (1540-1596)

Other synonyms of Francis Drake include Drake.

Francis Drake (noun)	Sir Francis Drake (noun)
English explorer and admiral who was the first Englishman to circumnavigate the globe and who helped to defeat the Spanish Armada (1540-1596)	English explorer and admiral who was the first Englishman to circumnavigate the globe and who helped to defeat the Spanish Armada (1540-1596)