Iwo Jima vs Iwo

Iwo Jima and Iwo both are nouns.

Word	Noun	Adjective	Verb	Adverb
Iwo Jima	Yes	No	No	No
Iwo	Yes	No	No	No

As nouns, Iwo Jima and Iwo are synonyms defined as:

Iwo Jima and Iwo: a bloody and prolonged operation on the island of Iwo Jima in which American marines landed and defeated Japanese defenders (February and March 1945)

Other synonyms of Iwo Jima include Battle of Iwo Jima, invasion of Iwo.

Iwo Jima (noun)	Iwo (noun)
a bloody and prolonged operation on the island of Iwo Jima in which American marines landed and defeated Japanese defenders (February and March 1945)	a bloody and prolonged operation on the island of Iwo Jima in which American marines landed and defeated Japanese defenders (February and March 1945)
the largest of the Volcano Islands of Japan