The phrase "such a" is commonly used to describe something. However, using synonyms can add variety and depth to your writing. Some alternatives to "such a" include "such an," "so," "very," "extremely," "remarkably," "exceedingly," and "unusually." These words can help to emphasize the intensity or uniqueness of something, depending on the context. Another option is to use a hyperbole, such as "absolutely," "positively," or "utterly." Ultimately, selecting the right synonym depends on the tone and purpose of your writing, but experimenting with different options can help to enhance your language and impact.