Upstairs and downstairs and Up and down

Up and down and upstairs and downstairs are semantically related. In some cases you can use "Up and down" instead an adjective phrase "Upstairs and downstairs".

Up and down adverb - Moving backward and forward along a given course.

Upstairs and downstairs and up and down are semantically related. Sometimes you can use "Upstairs and downstairs" instead an adjective phrase "Up and down".