Upstairs and downstairs and Wall-to-wall

Wall-to-wall and upstairs and downstairs are semantically related. In some cases you can use "Wall-to-wall" instead an adjective phrase "Upstairs and downstairs".

Wall-to-wall adjective - Present in all places and at all times.

Upstairs and downstairs and wall-to-wall are semantically related. You can use "Upstairs and downstairs" instead an adjective phrase "Wall-to-wall".