The phrase "such one" is often used to refer to a specific thing or person that has been previously referenced. However, there are many other phrases and words that can be used as synonyms for "such one." These include "the one in question," "the specific thing/person," "that particular item/individual," "the aforementioned," "the designated," "the identified," "the selected," and "the chosen." Using these synonyms can help to add variety and clarity to your writing and make it easier for your readers to understand your meaning. So next time you find yourself writing "such one," consider using one of these alternatives instead.