I worship Humpty-Dumpty, so when I use a word, it means precisely what I intend it to mean, and nothing else.
I do wish we wouldn't use words normally associated with worship because so many theists--and Republicans, go figure--are fond enough of equivocation to offer it as "proof" that we are just as crazy as they, as in "I don't have enough faith to be an atheist" (wtf!) or when they tell us we have faith, too, because we have "faith" that the sun will rise tomorrow. "Theory" is also frequently used in its vernacular sense to denigrate scientific theories. My approach is to correct people when I can and to use the words distinctively, not saying "theory" when I mean "best guess" and not saying "faith" when I mean "reason." Languages change over time, as do the meanings of words, depending on how people use those words; that's one of the reasons dictionaries are constantly changing. The OED gives not only the current meanings of words, but quotations illustrating what the words meant centuries ago and showing approximately when changes in meaning occurred. In Jacques Barzun's From Dawn to Decadence, the author frequently points out how words have changed, going so far as to say that "man" originally meant "humans," so the modern convention of using "him or her" rather than the male pronoun as all inclusive, is an awkward absurdity. Good luck straightening that one out, Jacques. If we want to communicate with the other side, we should keep in mind what certain words mean to them and be careful how we use them.
As far as stereotyping Christians goes, I find that no two Christians seem to have the same set of beliefs. You can quote from their church's website, and they will say, "Well, I don't believe that. I believe . . . . " And there is a vast difference between, say, Episcopalians in New Hampshire and snake handlers in North Georgia. I think it's fair to say that if one is a member of Focus on the Family, one shares the beliefs--at least most of them--of James Dobson. Fundamentalists/evangelicals have been quite successful in stealing the word "Christian" out from under the more mainstream, more liberal established church organizations.
@Daniel "You think all atheists believe in Evolution which isn't true."
Daniel, can you please tell me what other theories of life atheists believe in? As far as I'm aware there are only two; evolution and intelligent design (creationism) and ID requires a belief in god, which as we know, doesn't apply to atheists.....