Back ends and Back end

Back end and back ends are semantically related. in rear topic. In some cases you can use "Back end" instead a noun phrase "Back ends", when it comes to topics like end part, back or end part, animate rear end.

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

Back ends and back end are semantically related. Sometimes you can replace phrase "Back ends" with "Back end", this phrases are similar.