The phrase "hast a claim" means to have a right or entitlement to something. There are many synonyms that can be used to convey the same meaning, depending on the context. Some of these synonyms include "have a right to," "be entitled to," "possess a legitimate demand for," "lay a hold on," "justify," "merit," "warrant," and "lay a claim to." These synonymous phrases are commonly used in legal and formal contexts to assert ownership or entitlement over something. However, in everyday language, simpler phrases such as "deserve" or "have a right to" are often used interchangeably with "hast a claim".