Most of the people seem permanent residency and citizenship both are same, but a lot of difference between permanent residency and citizenship. Most of the people apply for naturalization
in three processes such as permanent residency holder legally married United States person.
Get Citizenship through their parents. Similarly get green card through family members or through the job, and refugee. If you have relatives in the USA, you have more probabilities to get citizenship.
For naturalization test you must require English language similarly you must know knowledge about the history and tradition about US government and society as well. If you are living in the USA at least five years with green card apply for citizenship through N-400 form Green card has limited benefits compel with citizenship.
It is only legally you have permanent resident. But you can't vote and not get all tax filing benefits. Immigrant Green card holder can't eligible to get a passport and must live at least two years (thirty months) out of five years.
If you have only permanent residency, you must renew it every ten years. Means your nativity (citizenship) is belongs to your native country. If you are interested to go to another country you can permit maximum six months.
Commonly Citizenship can get two ways such is being born to a U.S. citizen and the second one is by naturalization. If you have permanent residency through marriage, you can get citizenship after three years maximum five years. It's possible to expire your green card, but citizenship is not expired.
Permanent residency can be taken away to your country back for committing serious crimes and also possible to reject green card, while citizenship cannot be taken from you. With the help of form I-131 you can eligible out of the United States for more than one year. You need a re-entry permit to get back to the USA.
You can get a re-entry permit through I-131 form. It's better please read the full manual of M-476 before applying Naturalization If you have a green card, your permanent resident status will be terminated automatically.
Generally green card has permission for a maximum ten years. Apply I-90 form for renewal your old expired card. For investors seeking a lawful permit through I-526 petition.
Please note: The USCIS issue certificates of citizenship to an individual, who was born out of the states, but not for US citizens who are born in the United States. It's better to take legal advice of the American Immigration Lawyers Association (AILA) member. Or top most immigration attorney New York law firm for best results.