Bum and Back end

Bum noun - The part of the body upon which someone sits.

Back end and bum are semantically related In some cases you can use "Back end" instead a noun "Bum".

Nearby Words: bumpy, bumping

Back end noun - The side of an object that is opposite its front.

Bum and back end are semantically related in rear topic. Sometimes you can use "Bum" instead a noun phrase "Back end", if it concerns topics such as animate rear end.