There are various synonyms for the phrase "stunning imagery" that can be used to describe a breathtaking visual representation. Some words that can be used in place of stunning are impressive, remarkable, awe-inspiring, staggering, dazzling, and magnificent. Similarly, imagery can be replaced with terms like visuals, pictures, graphics, or illustrations. Thus, "impressive visuals," "awe-inspiring graphics," and "dazzling illustrations" are all synonyms for stunning imagery. It is essential to choose the appropriate word depending on the context, but these synonyms can help elicit a more profound emotional response from the audience.