For general sounds:
* Creak: This describes the sound of leather bending and flexing, especially when it's old or dry.
* Rustle: This evokes the sound of leather moving or rubbing against itself, like when you run your hand over a leather jacket.
* Thud: This captures the sound of leather hitting a surface, like a leather bag falling to the ground.
* Slap: This describes the sound of leather striking a surface, like a leather whip.
* Crack: This can describe the sound of leather splitting or tearing, or the sound of leather being folded.
For more specific sounds:
* Whine: This describes the sound of leather stretching or straining.
* Swish: This captures the sound of leather moving through the air, like a leather garment flapping in the wind.
* Hum: This can describe the low, resonant sound of leather vibrating, like the sound of a leather drum.
Ultimately, the best word to describe the sound of leather will depend on the specific context.