| Answer | Crossword Clue |
|---|---|
| ROLL | Deep prolonged sound. |
| SSSS | Prolonged sibilant sound. |
| MOAN | Prolonged sound of grief |
| ROLL | Prolonged sound, as of drums. |
| GROAN | Deep sound |
| DONG | Deep sound. |
| GRUNT | Deep guttural sound. |
| BONG | Deep bell sound |
| BOOM | Deep hollow sound. |
| CLANG | Deep ringing sound. |
| BOOM | Deep, hollow sound. |
| GRUNT | Deep, guttural sound. |
| HMM | Sound of deep thought |
| DONG | Sound with a deep tone. |
| SONOROUS | Producing a deep rich sound |
| SONOROUS | Producing a deep, rich sound |
| RIPE | Like thumped watermelons making a deep sound |
| SONOROUS | Loud, deep or resonant, as a sound |
| SONOROUS | Loud, deep, or resonant, as a sound |
