up and down, left and right; top and bottom, left and right
hierarchical relationship; superior-subordinate relationship; senior-junior relationship
up-and-down motion; vertical movement (e.g. in an earthquake)
first and second volume (e.g. of a book); volume one and volume two; book one and book two
both (railway) tracks; (both) up and down tracks (lines)
high and low; (people of) all ranks and classes
upper and lower houses of parliament
love makes people equal; love is a leveler; love is blind