Word Rectangle

"Uh……… what is this?" I hear you ask. Great question.

A word rectangle is a rectangle of letters which comprise words when read horizontally or vertically. Behold:

G L A S S E S
R E L A P S E
I M I T A T E
S M E A R E D
T A N N E R Y

This is a brute-force solution to this problem. It runs on a Raspberry Pi on my desk.

You can read more about the word rectangle and its history on Wikipedia.

This is version two; version one is here. This version reduces the amount of work for each iteration and also has some tests.