The phrase "more impressing" can be replaced with several synonyms to add variety and depth to your writing. Some examples include "more stunning," "more awe-inspiring," "more remarkable," "more extraordinary," "more exceptional," and "more phenomenal." Each of these synonyms conveys a sense of great impact and importance, making them ideal for describing feats, accomplishments, and experiences that leave a lasting impression. Experiment with different synonyms to add nuance and precision to your writing, and choose the one that best captures the specific quality you want to convey.