Sir Henry Morgan vs Henry Morgan

Sir Henry Morgan and Henry Morgan both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sir Henry Morgan	Yes	No	No	No
Henry Morgan	Yes	No	No	No

As nouns, Sir Henry Morgan and Henry Morgan are synonyms defined as:

Sir Henry Morgan and Henry Morgan: a Welsh buccaneer who raided Spanish colonies in the West Indies for the English (1635-1688)

Other synonyms of Sir Henry Morgan include Morgan.

Sir Henry Morgan (noun)	Henry Morgan (noun)
a Welsh buccaneer who raided Spanish colonies in the West Indies for the English (1635-1688)	a Welsh buccaneer who raided Spanish colonies in the West Indies for the English (1635-1688)