I like to combine the word faith with faithfulness.It requires the action of obedience, otherwise faith alone if it does not have obedience is dead, being incomplete.
Just as a body without the spirit is dead, being incomplete.
Was not Abraham our father justified by works when he offered Isaac his son on the altar? Do you see that faith was working together with his works, and by works faith was made perfect? And the Scripture was fulfilled which says, “Abraham believed God, and it was accounted to him for righteousness.” And he was called the friend of God. You see then that a man is justified by works, and not by faith only.
Likewise, was not Rahab the harlot also justified by works when she received the messengers and sent them out another way?
For as the body without the spirit is dead, so faith without works is dead also. James 2:21-26
JLB
I believe them to be the same. And having both gives me a broader understanding of what faith is.
It is being faithful to God.
Being faithful to God is doing His will on earth.
If a man believe God in his heart and say it with his mouth.
This is an act of faith. Faith then may increase..