Has an Olympic Hockey (Women) game ever ended 8-1?
Exactly once. On February 14, 2006, Canada beat Sweden 8-1, and no Olympic Hockey (Women) game before or since has ended that way. When it happened it was a scorigami, the first 8-1 in league history.
That makes 8-1 the 27th most common final score out of 41 that have ever occurred in Olympic Hockey (Women). One point away, 9-1 has happened 1 times and 8-2 has happened never.