Cameroon scored three goals in a nine-minute stretch late in the first half and routed Ecuador 6-0 on Monday in the Women's World Cup debuts for both nations.
Gaelle Enganamouit netted a hat-trick for 53rd-ranked Cameroon, scoring in the 36th and 73rd minutes capping off her performance with a penalty kick in the fourth minute of stoppage time.
Madeleine Ngono Mani put Les Lionnes ahead in the 34th minute, and captain Christine Manie's penalty kick made it 3-0 in the 44th.
Ligia Moreira of 48th-ranked Ecuador was given a red card for a foul in the 66th minute.
Cameroon plays defending champion Japan on Friday, and Ecuador meets Switzerland next.