There are numerous synonyms for the phrase "with rapid strides." Some alternatives include "with quick steps," "with brisk pace," "at a fast clip," "with swift stride," "at lightning speed," "with haste," and "in a hurry." These phrases all carry a sense of urgency, speed, and determination. They can be used to describe someone who is moving quickly towards a goal or someone who is in a hurry to get something done. Whether you choose one of these synonyms or another phrase, using descriptive language to paint a vivid picture of action can add depth and interest to your writing.