noun / verb
thump
THUMP/θˈʌmp/
A heavy blow or movement that makes a dull sound.
The heavy sack lands with a thump on the floor.

Etymology
The noun comes from the verb meaning “strike hard,” which probably imitated the sound of a heavy impact. The sound-name thus reflects the noise made by the action.
In context
Thump Thump Thump the whole house began to tremble with the noise of someone coming