Scrabble board with no plays.

The Game Room
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I was also going to mention voxel, common in computing circles but I don’t know if it’s officially allowed.

edit: never mind, already answered by zombies

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Here is a definitive-seeming discussion of this question.

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For those who didn’t bother reading the whole thread, I think it’s worth quoting the person who responded to the linked thread (titled “can 2 words end a Scrabble game?”) with “wanna fuck?”. Actually the whole thread is quite a good read.