Spelling

Hi,

My dictionary has it as two words.

Clive

My American Heritage Dictionaryhas it listed as one word (although when I went to look it up, I expected to find both). Therefore, I will verify both Clive's answer and mine.

And there is the issue. The common spelling around work is two, but my "American Heritage College dictionary" says it's one. The local transportation department says one. Webster's online wants to pay to find out. Geology sites have it listed as both....

That is when you develop an in-house style guide. Whenever you use it, you use it the same way. For example, in my company "wastewater" is always one word. It avoids the need to look in multiple dictionaries and consult multiple sources. Some things really are equally correct - so pick one and stick with it.