Sir Alec Guinness vs Alec Guinness

Sir Alec Guinness and Alec Guinness both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sir Alec Guinness	Yes	No	No	No
Alec Guinness	Yes	No	No	No

As nouns, Sir Alec Guinness and Alec Guinness are synonyms defined as:

Sir Alec Guinness and Alec Guinness: English stage and screen actor noted for versatility (1914-2000)

Other synonyms of Sir Alec Guinness include Guinness.

Sir Alec Guinness (noun)	Alec Guinness (noun)
English stage and screen actor noted for versatility (1914-2000)	English stage and screen actor noted for versatility (1914-2000)