What is a good word list?

I’m looking for a text file online that includes a list of English words. I would prefer to have one that does not include proper nouns or abbreviations.

The only ones I have been able to find include things like cspi, an abbreviation for the Center for Science in the Public Interest, and hwan, and other extremely obscure words. I would like to have a list of normal words.

Does anyone know where I could find this?
By the way, this would be for commercial uses.