full general vs First Duke of Wellington

full general and First Duke of Wellington both are nouns.

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

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