A family of Microsoft word processing software products for creating web, email, and print documents.
There is no autosave in Word, only the automatic saving of recovery information in the event of a crash, and I don't suppose it is any different in the iPad version. Did you actually save your document? If so the last saved version will be at the location where you saved it.
If it has never been saved and Word has been closed (perhaps to perform an automatic update) the document will be lost. Always save your work regularly to avoid such disasters.
I don't know how the iPad handles autorecovery information, but there is a small possibility that there may be a recoverable recovery file available that is associated with this document.