What is the difference between field, variable, attribute, and property in Java POJOs?

When referring to internal private variables of Java POJOs that have getters/setters, I've used the following terms:

• field
• variable
• attribute
• property

Is there any difference between the above? If so, what is the correct term to use? Is there a different term to use when this entity is persisted?

From here: http://docs.oracle.com/javase/tutorial/information/glossary.html

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• field

  • A data member of a class. Unless specified otherwise, a field is not static.

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• property

  • Characteristics of an object that users can set, such as the color of a window.

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• attribute

  • Not listed in the above glossary

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• variable

  • An item of data named by an identifier. Each variable has a type, such as int or Object, and a scope. See also class variable, instance variable, local variable.