Federal preemption refers to a legal doctrine that allows federal law to supersede any state law or regulation in certain areas. This means that state laws may be invalidated if there is a conflict with federal laws on the same issue. Some synonyms for federal preemption include federal supremacy, federal preclusion, preemption doctrine, federal preemption rule, federal preemption doctrine, and federal preemption principle. These terms are often used interchangeably in legal contexts to describe the application of federal law over state law in various areas, such as environmental protection, telecommunications, and immigration. Federal preemption is a crucial aspect of constitutional law that helps to maintain consistency and uniformity in federal policy across the states.