Sir Arthur Stanley Eddington vs Arthur Eddington

Sir Arthur Stanley Eddington and Arthur Eddington both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sir Arthur Stanley Eddington	Yes	No	No	No
Arthur Eddington	Yes	No	No	No

As nouns, Sir Arthur Stanley Eddington and Arthur Eddington are synonyms defined as:

Sir Arthur Stanley Eddington and Arthur Eddington: English astronomer remembered for his popular elucidation of relativity theory (1882-1944)

Other synonyms of Sir Arthur Stanley Eddington include Eddington.

Sir Arthur Stanley Eddington (noun)	Arthur Eddington (noun)
English astronomer remembered for his popular elucidation of relativity theory (1882-1944)	English astronomer remembered for his popular elucidation of relativity theory (1882-1944)