The phrase "hath a case" means that someone has a compelling argument or evidence to support their claim. Synonyms for this phrase include "has a point," "is justified," "has a valid argument," "has a strong case," and "has a convincing case." These phrases can be used interchangeably to express the idea that someone's position or argument is sound and logical. It is important to use these synonyms to ensure clear communication and to avoid repetition in writing and speaking. Additionally, using synonyms allows for flexibility in language and helps to convey the intended meaning more effectively.