"Sauvage" is a French word that translates to "wild" in English. There are various synonyms for this word that could be used in writing to emphasise the untamed nature of something or someone. Some of the appropriate synonyms include "untamed," "uncivilised," "feral," "savage," "wilderness," and "rugged." These words give the reader a more vivid idea of the raw, natural state of a thing or person. For example, one could say "the untamed beauty of the forest," "the rugged terrain of the mountain range," or "the savage intensity of the animal kingdom." By using synonyms for "sauvage," one can add depth and detail to their writing.