Example is an egg
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The shape of an egg.
Egg
One face, the same as a circle. For both a 2D and a 3D oval it's the same. 3D ovals and circles have no vertices or edges. 2D ovals and circles have one edge.
A three dimensional oval is simply called an egg, or more mathematically, an ovoid. A three dimensional ellipse (a more symmetric oval) is called a prolate spheroid, or oblate spheroid, depending on how the ellipse is rotated.
In 2D, there is the regular circle and the oval. In 3D, there is the sphere (I am not entirely certain this a considered a circle though).