Has a Women's World Cup game ever ended 11-0?
Exactly once. On September 10, 2007, Germany beat Argentina 11-0, and no Women's World Cup game before or since has ended that way. When it happened it was a scorigami, the first 11-0 in league history.
That makes 11-0 the 22nd most common final score out of 28 that have ever occurred in Women's World Cup. One point away, 12-0 has happened never and 11-1 has happened never.