Assur vs Asur

Assur and Asur both are nouns.

Word	Noun	Adjective	Verb	Adverb
Assur	Yes	No	No	No
Asur	Yes	No	No	No

As nouns, Assur and Asur are synonyms defined as:

Assur and Asur: an ancient Assyrian city on the Tigris and traditional capital of Assyria; just to the south of the modern city of Mosul in Iraq

Other synonyms of Assur include Ashur.

Assur (noun)	Asur (noun)
an ancient Assyrian city on the Tigris and traditional capital of Assyria; just to the south of the modern city of Mosul in Iraq	an ancient Assyrian city on the Tigris and traditional capital of Assyria; just to the south of the modern city of Mosul in Iraq