Ans.01. Is freedom, liberation with the truth that there is no God.
Take someone with crutches, they have walking aids. A person without doesn't have them, the negative is being without them, it needs no replacement, they walk unaided.
02. To parrot what's been said to you, it is a negative definition. To ask for a positive one is like asking what's in a vacuum.
God, does not require replacement as something which never existed does not require replacement. When children grow out of believing in Santa Claus it doesn't get replaced. Actually, it does for some with God. Replace religion with something would just make it religion by another name. Like someone who gives up smoking, they replace cigarettes with substitutes but with luck long term there is no replacement.
Really isn't a better way to define it, the very word simply means no theism. You're asking for a negative constructed word to be turned into a positive, perhaps to make a counter-point, so why not make your counter-point already. You can't turn words into something else or they become other words. Trying to think of another analogy word, perhaps (vacuum, empty) clear... ask what clear is cluttered up with or what colour it is or something.
01. What sort of freedom is that when you say there is no God? You become a slave to Satan and Devil and your own hallucinations.
Just shouting there is no God, will not change the natures realities in any way.
02. So vacuum replaces what? So a world without religion is like people living in Jungle.
Then why do you not replace that Model in your real life? Why do you need all these Assembles and Parliaments to make laws and more laws and still more laws to regulate every part of your life.
Dont you accept most of these laws even if you do not like it.
Why it is only religion where you want total Anarchy? That does not make sense, does it?