It was a constant thunder, gaining in intensity, then fading back, only to come on strong again.

Between the clatter of the rain and the constant thunder that boomed among the hills, it was impossible to talk.

From the drop zones to the west came the nearly constant thunder of guns.

A hot wind comes up out of it, and you can hear a sound like constant thunder coming out of the depths.

All she could hear was the apocalyptic percussion of constant thunder.

Rod worked his way up the cliff face, climbing higher and higher into constant thunder.

The night passed with almost constant thunder and lightning in the west.

Under his face was the constant thunder of the churning propeller.

The motors made a constant, humming thunder in his ears.

Rain battered the castle wall while the stone floor seemed to vibrate from the almost constant thunder.