You could do that via a Word field or a macro, but not via any automatic built-in process.

The field-based approach would be to:
• press Cmd-F9 to create an empty field
• type '=2015 \* CardText' between the field braces, thus: {=2015 \* CardText}
• press F9 to update the field.
You would then see 'two thousand fifteen' - note the lack of 'and'. More sophisticated approaches that allow you to input 2015 into an existing field and have it display 'two thousand and fifteen' are also possible.

There are numerous macro-based solutions for converting numbers to text on the web.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]