This is a special post for quick takes by leogao. Only they can create top-level comments. Comments here also appear on the Quick Takes page and All Posts page.
Like überall? Maybe jirgendwo vs nüberall are the better words. Like neverywhere or nalways.
2Morpheus
There is irgendwo. Which is somewhere. So you were close. It's a proper antonym where even the quantifier inverts as in first order logic. Presumably irgendwo was first. There is also irgendwer. Weirdly nirgendwer is not common. That's niemand.