Ariz. Rev. Stat. § 10-401
A. A corporate name:
B. Except as authorized by subsections C and D of this section, a corporate name shall be distinguishable from all of the following:
C. A corporation may apply to the commission for authorization to use a name that is not distinguishable from one or more of the names described in subsection B of this section. The commission shall authorize use of the name applied for if either:
D. A corporation may use the name, including a fictitious name, of another domestic or foreign corporation that is used in this state if the other corporation is incorporated or authorized to transact business in this state and the proposed user corporation either has: