A "green card," also known as a "permanent resident card," is issued to individuals who have been granted the legal right to live and work permanently in the United States. On the other hand, U.S. citizens are individuals who have gone through the "naturalization" or "citizenship" process and are granted all the rights and privileges associated with U.S. citizenship, including the right to vote. Citizenship is a more permanent status than a green card, as U.S. citizens cannot be deported and have more rights than green card holders. To become a U.S. citizen, individuals must meet certain criteria and complete the naturalization process.