I know you say she loves the name, but you didn’t mention if she was 100% set on it. If there is any room for advice or suggestions I’d try to give some, as Arizona does not strike me as a great name for a person.
If she is set, however, I would steer completely clear of word names. Otherwise she’ll end up sounding like an exotic local food or a motel or a euphemism. And just aesthetically, I probably wouldn’t start or end the middle name with an A, to avoid repetitive sounds. What about
Arizona
BeatrixArizona
BridgetArizona
CamilleArizona
CarmenArizona
CecilyArizona
CelandineArizona
CelesteArizona
CelestineArizona
CharlotteArizona
CoralieArizona
DelythArizona
ElspethArizona
EvadneArizona
IngridArizona
JaneArizona
JudithArizona
LioritArizona
MabelArizona
MargaretArizona
MaudArizona
PenelopeArizona
PersephoneArizona
TamsinArizona
TanithArizona
VivianArizona
Xanthe