See all the goals here.
The visitors hit the front thanks to skipper Emily van Egmond after 12 minutes.
Needing a win to secure a berth in the post season, Newcastle doubled its lead midway through the half.
Ellie Carpenter got Canberra back into the contest before the break.
Van Egmond grabbed a brace with 25 minutes to go.
Then a well worked move made it 4-1, before Stengel grabbed a late hat trick.