Cover girl noun – A very pretty girl who works as a photographer's model. Centrefold and cover girl are semantically related. In some cases you can use "Centrefold" instead a noun phrase "Cover girl".
Centrefold noun – A magazine center spread; especially a foldout of a large photograph or map or other feature. Cover girl and centrefold are semantically related. Sometimes you can use "Cover girl" instead a noun "Centrefold".