First Duke of Wellington vs full general

First Duke of Wellington and full general both are nouns.

Word	Noun	Adjective	Verb	Adverb
First Duke of Wellington	Yes	No	No	No
full general	Yes	No	No	No

First Duke of Wellington (noun)	full general (noun)
British general and statesman; he defeated Napoleon at Waterloo; subsequently served as Prime Minister (1769-1852)	a general officer of the highest rank