Cameroon converted three penalty kicks. Enganamouit scored in the 36th and 73rd minutes, then got 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.
Aboudi Onguene converted a penalty kick in the 79th.
Ligia Moreira of 48th-ranked Ecuador was given a red card for a foul in the 66th minute.
Also, Francisca Ordega's 87th-minute goal pulled Nigeria into a 3-3 draw with Sweden in Winnipeg.
Linda Sembrant came off the bench to put Sweden ahead 3-2 before Ordega's drive sailed between goalkeeper Hedvig Lindahl's legs.
Nilla Fischer put Sweden up 2-0 in the first half with a goal in the 31st minute after Nigeria conceded an own goal. Nigeria evened it in the second half when Ngozi Okobi and Asisat Oshoala scored in a 3-minute span.
In the final match of the day Aya Miyama converted on a penalty kick in the 29th minute to lift Japan to a 1-0 win over Switzerland in Vancouver.