A chamfer and a bevel are both forms of sloped edges, but there is a marked difference between the two.  A chamfer is a type of edge that joins two surfaces at a 45-degree angle, whereas a bevel can have any angle other than 90 or 45 degrees. The term "bevel" refers to a slope in general, whereas "chamfer" refers to a specific type of bevel with a 45-degree angle.