Bell-shaped curve and Curved shape

Bell-shaped curve noun - A symmetrical curve representing the normal distribution.

Curved shape and bell-shaped curve are semantically related. In some cases you can use "Curved shape" instead a noun phrase "Bell-shaped curve".

Curved shape noun - The trace of a point whose direction of motion changes.

Bell-shaped curve and curved shape are semantically related. Sometimes you can replace phrase "Bell-shaped curve" with "Curved shape", this phrases are similar.