People use it, therefor it's a word...just an obsolete one. Another one: "irregardless"..I hear people using that one a lot too.
If you say a word, and the majority of your society understands what you mean, then it's a word. Just because it isn't listed books and encyclopedias doesn't mean it's not acceptable. The whole point is for your audience to understand, and if they do, that's all that matters.
How about agreemation? Agreeality? Vocabulary will change. Just use it a lot and it will become more commonplace. Normalcy wasn't a word either, until Harding used it and now everyone uses it.