Faith alone is a biblical term.
Faith indeed can be alone.
Here it is again.
Thus also faith by itself, if it does not have works, is dead.
James 2:17
Faith alone is dead.
Faith alone can not save.
Therefore the idea that we are saved by faith alone is unbiblical.
You're making a few of mistakes here. (Lengthy, but please bear with me, here.)
First off, genuine faith can NOT be 'alone'. John makes it crystal clear that the true believer can not remain (abide/continue) in sin. If he does, he is showing himself to not be born again, he has no faith by which to have become a child of God:
8The one who practices sin is of the devil 1 John 3:8
You keep creating this fictitious person who abides in sin but is of God. It's impossible, scripturally, that James is talking about that kind of person, because the Bible says that person
does not exist.
Secondly, you are erroneously projecting James' "not by faith alone" argument onto Paul's "righteousness by faith apart from works" argument. James is making no argument that righteousness is by faith
and works. That puts James and Paul so utterly in contradiction with each other that, if they really are contradicting each other, we can all just throw our Bibles away and go back to our sin.
Thirdly, you confuse
becoming a saved person with being saved from God's wrath at the final judgment. You become a saved person entirely by God's grace and mercy in the forgiveness of your sin when you first believe,
apart from and without consideration of any righteous work you have performed. That is Paul's argument.
At the resurrection, good works are required in that they are the expected and obligatory works that people who are born again of God perform (that 1 John 3:8-10 thing), thus showing them to be born again believers who can enter the kingdom of God. That's James' argument. It is only in that sense that we are 'saved' by our works.
Works of righteousness are the evidence upon which the
already saved person escapes the wrath of God and enters into the kingdom. They don't
make him saved. That is not what James is saying. Righteous obedience is the distinguishing 'mark' in the flesh, the spiritual circumcision of the heart that
shows that you belong to God in salvation, not
earns you salvation. Circumcision of the heart in the putting off of the deeds of the flesh is useful toward sorting the sheep from the goats at the resurrection. The putting off of the deeds of the flesh in no way MAKES you a saved person. That is the works justification gospel that Paul condemned.
Circumcision of the heart in the putting off of the deeds of the flesh is the
sign of the righteousness you already have by faith, apart from works, just as Abraham's circumcision that he received after he believed God's promise of a son was the
sign of the righteousness of faith he had while still uncircumcised.
11And he received the sign of circumcision as a seal of the righteousness that he had by faith while he was still uncircumcised. Romans 4:11
Maybe this is a little hard for you to understand at first, but the bottom line is, circumcision of the heart (the putting off of the deeds of the flesh) is the
SIGN of the righteousness you already have, not the way you obtain righteousness. Abraham was not declared righteous because he got circumcised, rather, Abraham got circumcised because he was declared righteous. Obedience is the
sign of righteousness, not the procurer of it. And, surely, no one without that sign will be saved when Jesus comes back. No one is arguing against that.