To TD
You're still projecting the modern English noun usages (i.e. With the endings "ist" and "ism") backwards upon the Greek adjective.
"It is only about a decade after Socrates' death, in Plato (ca. 429 - 347 B.C.) that we start to find the Greek word atheos, which originally was used in the meaning, "godless, without gods, godforsaken," denoting intellectuals who denied the gods of the city or any form of deity." -Martin, Michael The Cambridge Companion to Atheism p. 19
"Atheism and atheist are words formed from Greek roots and with Greek derivative endings. Nevertheless they are not Greek; their formation is not consonant with Greek usage. In Greek they said átheos and atheotēs; to these the English words ungodly and ungodliness correspond rather closely. In exactly the same way as ungodly, átheos was used as an expression of severe censure and moral condemnation; this use is an old one, and the oldest that can be traced. Not till later do we find it employed to denote a certain philosophical creed." -Drachmann, A.B. Atheism in Pagan Antiquity (Emphasis mine)
For argument sake I will grant you “without god” now what? What does that prove? What is it? Is it without out god on Mondays? Without god at work? Without god on vacations? Notice the incompleteness. It is a cowardly position to take.
When it comes to the deity question there are only three positions one can take. 1 Theist, 2 Atheist, 3 Agnostic. Position 1 and 2 either affirms or deny the existence of deity and has to provide support. Position three is the only one that gets to sit on the fence. Amazing how many want to be identified as atheist but then want to change the definition. What it comes down to is that many want to deny the existence of deity in order to live a lifestyle contrary to a theistic worldview, but want to continue ontologically with theistic ideas for their benefit. Following Atheism to a logical conclusion there is no meaning or purpose in life, no objective morality. Basically want to sit on the fence with the Agnostic and reap the benefits of both sides of the debate. I say ‘man up’. If Atheist embrace everything that is Atheist. Cut the umbilical cord from Theism, and go happily into oblivion with fear and despair to which only a Nietzsche or a Jean Paul Sartre can do full justice.
“‘Atheism’ means the negation of theism, the denial of the existence of God.” J. J. C. Smart