Asur vs Assur

Asur and Assur both are nouns.

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

As nouns, Asur and Assur are synonyms defined as:

Asur and Assur: 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 Asur include Ashur.

Asur (noun)	Assur (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