Ground level and Rock-bottom

Ground level noun - The height of the ground on which something stands.

Rock-bottom and ground level are semantically related. in short topic. In some cases you can use "Rock-bottom" instead an adjective phrase "Ground level".

Rock-bottom adjective - Of, relating to, or located at the bottom.

Ground level and rock-bottom are semantically related. Sometimes you can replace phrase "Ground level" with "Rock-bottom", this phrases are similar.