Battle of Actium vs Actium

Battle of Actium and Actium both are nouns.

Word	Noun	Adjective	Verb	Adverb
Battle of Actium	Yes	No	No	No
Actium	Yes	No	No	No

As nouns, Battle of Actium and Actium are synonyms defined as:

Battle of Actium and Actium: the naval battle in which Antony and Cleopatra were defeated by Octavian's fleet under Agrippa in 31 BC

Battle of Actium (noun)	Actium (noun)
the naval battle in which Antony and Cleopatra were defeated by Octavian's fleet under Agrippa in 31 BC	the naval battle in which Antony and Cleopatra were defeated by Octavian's fleet under Agrippa in 31 BC
	an ancient town on a promontory in western Greece