| Answer | Crossword Clue |
|---|---|
| SETOFF | Spur, as a chain reaction |
| DOMINOS | Pieces in a chain reaction |
| REARENDER | Result of a chain reaction accident, perhaps |
| initiators | A substance that starts a chain reaction |
| critical | (of a nuclear reactor or fuel) Maintaining a self-sustaining chain reaction |
| RUST | Chain reaction? |
| CLANK | Chain reaction? |
| CRITICALMASS | Chain reaction requirement |
| DOMINOEFFECT | Chain reaction metaphor |
| FERMI | Chain reaction pioneer |
| DOMINOES | Chain-reaction pieces |
| DOMINO | Chain-reaction theory |
| ATOMICPILE | Chain reaction facilitator |
| KEANU | Reeves of "Chain Reaction" |
