Ouvrages, a French word, translates to "works" or "books" in English. However, there are many synonyms that can be used depending on the context and meaning of the word. For instance, specific to construction and engineering, the word can be substituted with "structures," "buildings," or "projects." In relation to literature, "publications," "volumes," or "manuscripts" could be used. In a broader sense, "works," "compositions," or "creations" can also apply. In short, understanding the connotation of the phrase and context can lead to the appropriate synonyms for ouvrages.