When you say suggests, do you mean the autofill results provide a Denver result as you type in the search term? If so waze has stated that only results that exist in the Google address database are used for the autofill results. Thus, you need to have the erroneous 3520 Emerson St, Denver CO entry deleted from Google maps. Google shows two results one in ZIP 80205 and one in 80216. I don't know if either of these are actually the ZIP for Englewood.
Regional Coordinator: Mid-Altantic, US
Verizon, Droid Turbo, Android 4.4.4, Waze 184.108.40.206