What would be the opposite of Writer's block? Writer's Free Flowing? Writer's Open Box? I suggest to you Writer's Ball, for two reasons. The opposite of square is round, so the opposite of a block would be a ball. Plus it means you are on a roll. Either that or you have so many ideas that they are all bouncing around very fast. Either way it works. It is not like a block that just sits there doing nothing, like a lump in a bog.