What would be a good onomatopoeia the sound of something rolling?

Here are some onomatopoeias for the sound of something rolling, depending on the object and surface:

For heavy objects:

* Rumble (e.g., a boulder rolling down a hill)

* Thud-thud (e.g., a barrel rolling on a wooden floor)

* Clang-clank (e.g., a metal wheel rolling on metal tracks)

* Grumble (e.g., a heavy wagon rolling over uneven ground)

For lighter objects:

* Roll (e.g., a ball rolling on a smooth surface)

* Whirr (e.g., a small ball rolling on a smooth surface)

* Tick-tock (e.g., a marble rolling in a bowl)

* Whizz (e.g., a coin rolling on a table)

For objects rolling downhill:

* Clack-clack (e.g., a rock rolling down a rocky slope)

* Whoosh (e.g., a log rolling down a hill)

* Tumble (e.g., a pile of leaves rolling down a slope)

For objects rolling on a specific surface:

* Scritch-scratch (e.g., a stone rolling on gravel)

* Whoosh-whoosh (e.g., a tire rolling on asphalt)

* Squelch-squelch (e.g., a log rolling on mud)

The best onomatopoeia will depend on the specific situation and the sound you are trying to evoke.