Dubya vs President George W. Bush

Dubya and President George W. Bush both are nouns.

Word	Noun	Adjective	Verb	Adverb
Dubya	Yes	No	No	No
President George W. Bush	Yes	No	No	No

As nouns, Dubya and President George W. Bush are synonyms defined as:

Dubya and President George W. Bush: 43rd President of the United States; son of George Herbert Walker Bush (born in 1946)

Other synonyms of Dubya include Bush, Dubyuh, George Bush, George W. Bush, George Walker Bush, President Bush.

Dubya (noun)	President George W. Bush (noun)
43rd President of the United States; son of George Herbert Walker Bush (born in 1946)	43rd President of the United States; son of George Herbert Walker Bush (born in 1946)