Forelle is a German word that refers to a specific breed of trout. The word has no direct synonyms, but there are several alternative terms that can be used to mean the same thing. In English, the word "trout" may be used to describe Forelle, as it is also a type of trout. Additionally, the term "brook trout" may be used, as Forelle are often found in small streams and brooks. Other synonyms could include "rainbow trout" or "brown trout," which are other types of trout that may be similar in appearance or habitat to Forelle. Ultimately, the most accurate term to use would be Forelle itself to avoid any confusion.