"Rushes headlong" is a phrase that describes a quick, impulsive, and often reckless action. There are several synonyms for this phrase that can be used to convey similar meanings. Some of these include "charges forward," "dives in headfirst," "plunges recklessly," "dives headlong," and "rushes headfirst." All of these phrases depict an action taken without pause or consideration for the consequences. They all suggest a sense of urgency and excitement, but also a lack of forethought or caution. When choosing a synonym for "rushes headlong," it is important to consider the context and tone of the sentence to ensure the correct meaning is conveyed.