I'm thinking this out as I type, and it might help to know the context...but USPS abbreviations might be the answer.
So, DenverDenver = Coco (Denver Colorado, Colorado = CO)
Dover is in several states - Delaware (DE), Massachusetts (MA), Vermont (VT), New Hampshire (NH)
Augusta+R = GAR (Georgia = GA)
or MER (Maine), MOR (Misouri)
Okay, so I'm going with Coco-De-Mer, which is apparently a large fan palm (tree), and also produces nuts!