| Answer | Crossword Clue |
|---|---|
| SPEEDOFSOUND | Exceeding it causes a boom |
| CRANE | It goes out with a boom |
| MAST | A boom might come out of it |
| STIMULUS | It causes a reaction |
| ENZYME | It causes a breakdown |
| NUCLEARFUSION | It causes quite a reaction |
| BELLYFLOP | It often causes a big splash |
