Given that you're on this board I'm assuming you're actually struggling over the seeming paradox, and not just musing for the sake of argument?
Let's start with "salvation". The original language of the New Testament uses a fairly common word for this -- it means healing, or in some narrow cases rescue or absolving or applying salve. It doesn't take on the meaning of ultimate eternal life in God's grace until it's pressed into that meaning in history. So the word was used not simply for ultimate salvation, but also for those who had accepted Christ (2 Tim 1:9, Titus 3:5). But it doesn't stop there: 2 Tim 1:9 also points to this past salvation being "given to us before the foundation of the world."
But ... how did the word "saved" get this flavor of ultimacy, if the word never had it before (which it didn't)? If God's works -- including some sense of salvation -- were finished from the foundation of the world, then in some sense our salvation has already been accomplished. God has already been reconciled to us. Were it otherwise, we'd have a hard time becoming reconciled to Him. Certainly it took His action in history to accomplish reconciliation. But who would He choose to apply His saving work?
Where does any of this start? Can we be reconciled enough to deserve God's acting on our behalf,
before we're reconciled by Christ's action on the Cross? It's a vicious circle. No, we can't be reconciled enough. We're saved by God's grace, given to us constantly since the foundation of the world. Otherwise He would have justly never let us be born in the first place. We're not good people.
So the very sense of ultimacy that "saved" now means to people -- that of eternal life in communion with God -- is based on the fact that when God starts something, He promises to finish it (Heb 12:2).
Now that said, that's very, very embedded in the theology. Normally we Reformed people talk about "saved" in the common, modern use of the term. And that meaning is "eternal life after death". In that sense, God does says He gives us eternal life when He makes us alive in Christ Jesus by the Spirit of God. And that happens in time and history.
I recognize the seeming paradox, orthedoxy. I have had it, too. With some narrowing of the word "save", you're quite right. But if the word is expanded to show what's happening to the elect, well the very process of electing people -- God choosing them -- lives under the category of "salvation".
If God promises that those He began to save will be saved in the future, isn't that unfailing certainty?
I give eternal life to them, and they will never perish Jn 10:28