Limits and Perimeter

Perimeter is a synonym for limits in boundaries topic. In some cases you can use "Perimeter" instead a noun "Limits", when it comes to topics like physical boundary.

Perimeter noun - The line or relatively narrow space that marks the outer limit of something.

Limits is a synonym for perimeter in boundary topic. You can use "Limits" instead a noun "Perimeter", if it concerns topics such as boundaries.