Richard Burton vs Sir Richard Francis Burton

Richard Burton and Sir Richard Francis Burton both are nouns.

Word	Noun	Adjective	Verb	Adverb
Richard Burton	Yes	No	No	No
Sir Richard Francis Burton	Yes	No	No	No

As nouns, Richard Burton and Sir Richard Francis Burton are synonyms defined as:

Richard Burton and Sir Richard Francis Burton: English explorer who with John Speke was the first European to explore Lake Tanganyika (1821-1890)

Other synonyms of Richard Burton include Burton, Sir Richard Burton.

Richard Burton (noun)	Sir Richard Francis Burton (noun)
Welsh film actor who often co-starred with Elizabeth Taylor (1925-1984)	English explorer who with John Speke was the first European to explore Lake Tanganyika (1821-1890)
English explorer who with John Speke was the first European to explore Lake Tanganyika (1821-1890)