Sadat is a proper noun, the name of a former Egyptian president, and is not generally used as a common noun or adjective. Therefore, synonyms for "sadat" are not applicable. However, if we look for synonyms for the adjective "sad," there are several words that can be used, such as sorrowful, unhappy, desolate, depressed, glum, doleful, miserable, dejected, mournful, wistful, blue, forlorn, and melancholy. These words can be used to describe a person, situation, or atmosphere that is unhappy or depressing. It is important to note that using synonyms can add depth and nuance to our language, helping us to communicate in a more precise and meaningful way.