Petersburg vs Old Dominion

Petersburg and Old Dominion both are nouns.

Word	Noun	Adjective	Verb	Adverb
Petersburg	Yes	No	No	No
Old Dominion	Yes	No	No	No

Petersburg (noun)	Old Dominion (noun)
the final campaign of the American Civil War (1864-65); Union forces under Grant besieged and finally defeated Confederate forces under Lee	a state in the eastern United States; one of the original 13 colonies; one of the Confederate States in the American Civil War
a town in southeastern Virginia (south of Richmond); scene of heavy fighting during the American Civil War