At the appointed signal the whole population rose into the air with a deep roar of wings.

Then, from the sand-dunes came the deep roar of an explosion.

The face saw Mercer's eyes open, and spoke with a deep friendly roar.

There was the deep, booming roar of a motor being run at full speed.

There was a deep booming roar from ahead of them in the valley.

Then, with a deep roar rumbling in its throat, the lion came forward again.

The front door slammed, and there was a deep roar of "Taxi!"

Hearing the deep, endless roar was quite bad enough.

One of the brutes in the circle gave voice to a deep roar and bit at its own arm.

He left the oak and paced away as a deep roar answered one of the calls.