Word Choice – On-site Versus Onsite

Pamela’s question: “I often see ‘onsite’ used as one word. Shouldn’t ‘on site’ be two words with the hyphen inserted if you are using the word as an adjective, such as on-site meeting? Is ‘onsite’ ever one word?”

BizWritingTip response: There is a tendency now to drop hyphens from words. But according to the Merriam Webster and Oxford dictionaries and The Chicago Manual of Style, the correct spelling — no matter how you use it in a sentence — is on-site.
Examples (correct)
We are waiting for the on-site inspection.
The meeting will be held on-site.

It is interesting that the spell check on my computer accepts both onsite and on-site. I am going to stick with on-site, but I can see how onsite will become accepted usage.