Apologies in advance for the lack of originality on this - I've been setting up half a dozen new sites the last few weeks or so, so am a little spent creatively.
Literally the only thing I could think to develop on this name would be a fact-filled site stating the different diameters of various objects - planets/countries, etc. With the .com currently undeveloped, there may be some potential there, but I'm not sure what the demand would be for this, or whether there'd be any demand at all.
In all honesty, I think it's one of those dictionary words where if it's not in .com, it doesn't have a great deal of value behind it due to the lack of brandability. Assuming you paid between $10-$30 for the name, you may be able to flip at high $xx or very low $xxx, but that would be the value ceiling I'd put on it.
Hope you prove me wrong!