First Duke of Wellington vs Arthur Wellesley

First Duke of Wellington and Arthur Wellesley both are nouns.

Word	Noun	Adjective	Verb	Adverb
First Duke of Wellington	Yes	No	No	No
Arthur Wellesley	Yes	No	No	No

As nouns, First Duke of Wellington and Arthur Wellesley are synonyms defined as:

First Duke of Wellington and Arthur Wellesley: British general and statesman; he defeated Napoleon at Waterloo; subsequently served as Prime Minister (1769-1852)

Other synonyms of First Duke of Wellington include Duke of Wellington, Iron Duke, Wellington.

First Duke of Wellington (noun)	Arthur Wellesley (noun)
British general and statesman; he defeated Napoleon at Waterloo; subsequently served as Prime Minister (1769-1852)	British general and statesman; he defeated Napoleon at Waterloo; subsequently served as Prime Minister (1769-1852)