"Gets cold feet" is an idiom used to describe a person who becomes nervous or hesitant about going through with a planned action. Some synonyms for this phrase include "backs out," "chickens out," "dithers," "flinches," "wavers," and "retreats." These words all convey a sense of someone who is uncertain or lacking in confidence. They can be used to describe someone who is reluctant to take a risk, change, or make a commitment. When faced with a daunting situation, it's important to remember that feeling afraid is natural. However, using these alternative phrases can help you express your concerns in a more descriptive and impactful way.