Aar

Aar, a large Swiss river about 200 m. long, which falls into the Rhine as it leaves Switzerland.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)

Aalborg * Aargau
[wait for the fun]
A'ali Pasha
Aachen
Aalborg
Aar
Aargau
Aarhuus
Aaron
Abaca
Abacus
Abaddon
Abarim
Abatement
Abauzit, Firmin
Abbadie