Port Arthur vs Battle of Port Arthur

Port Arthur and Battle of Port Arthur both are nouns.

Word	Noun	Adjective	Verb	Adverb
Port Arthur	Yes	No	No	No
Battle of Port Arthur	Yes	No	No	No

As nouns, Port Arthur and Battle of Port Arthur are synonyms defined as:

Port Arthur and Battle of Port Arthur: a battle in the Chino-Japanese War (1894); Japanese captured the port and fortifications from the Chinese

Port Arthur (noun)	Battle of Port Arthur (noun)
a battle in the Chino-Japanese War (1894); Japanese captured the port and fortifications from the Chinese	a battle in the Chino-Japanese War (1894); Japanese captured the port and fortifications from the Chinese
a major port city in northeastern China on the Liaodong Peninsula; now a part of Luda