deliverances: God's saving acts, named in the plural because rescuing people is something he does again and again
This word turns up only once in the whole Hebrew Bible, in Psalm 68:20, where the singer calls God "a God of deliverances." It belongs to a family of salvation words built on one Hebrew verb meaning to come to the aid of someone in danger, and it is by far the rarest of them. The two common nouns of that family, salvation (יְשׁוּעָה) and rescue (יֵשַׁע), cover the same ground; this is a heavier, less usual way of saying it.
What sets it apart is the plural. Hebrew often puts an idea in the plural to make it full or repeated rather than to count separate items, and that is what is happening here. The psalm is not tallying up a fixed number of rescues. It is saying that saving is simply what this God does, day after day, and the very next line keeps the thought concrete: getting out from death belongs to him.
The rescue in view is ordinary and physical rather than inward or spiritual. Across the Old Testament this family of words covers things like:
- winning a battle against an invading army
- being cleared when someone is falsely accused
- being pulled out of danger that would otherwise kill
Being saved from sin is where the family of words eventually arrives, but it arrives late, mostly after the Old Testament, and it is not what Psalm 68 is describing.