Well, if your column is sorted ascending alphabetically as in your example,
easiest thing to do would be to copy it to another copy and sort that column
in descending order.
But I suspect it's not that easy, so assuming your initial column is column
A and entries begin in row 1 and continue down the column unbroken (no empty
cells), then put this into row 1 of the other column:
=OFFSET($A$1,(COUNTA(A:A)-ROW()),0)
and fill it down to the end of the list in column A and see if that doesn't
do the trick.