As nouns the difference between rhein and rhine
is that rhein is an anthraquinone found in rhubarb while rhine is a watercourse; a ditch for water.
As a proper noun Rhine is
a river that flows through Switzerland, Austria, Liechtenstein, Germany, France and the Netherlands.
rhein
English
Noun
(-)
(organic compound) An anthraquinone found in rhubarb.
Synonyms
* cassic acid rhine
Proper noun
A river that flows through Switzerland, Austria, Liechtenstein, Germany, France and the Netherlands.