Aare vs Aar

Aare and Aar both are nouns.

Word	Noun	Adjective	Verb	Adverb
Aare	Yes	No	No	No
Aar	Yes	No	No	No

As nouns, Aare and Aar are synonyms defined as:

Aare and Aar: a river in north central Switzerland that runs northeast into the Rhine

Other synonyms of Aare include Aare River.

Aare (noun)	Aar (noun)
a river in north central Switzerland that runs northeast into the Rhine	a river in north central Switzerland that runs northeast into the Rhine