| Answer | Crossword Clue |
|---|---|
| OXIDE | Rust or laughing gas |
| OXIDE | Rust, tarnish, or laughing gas |
| NITROUSOXIDE | Laughing gas |
| NITROUS | .. oxide (laughing gas) |
| OXIDE | Nitrous ... (laughing gas) |
| NITROUS | .. oxide: laughing gas |
| OXIDE | Nitrous .. (laughing gas) |
| ETHER | Laughing-gas kin |
| OXIDE | Nitrous -- (laughing gas) |
| OXIDE | Nitrous ..... (laughing gas) |
| OXIDE | Nitrous ....: laughing gas |
| NITROUS | Laughing gas, familiarly |
| OXIDE | Laughing gas, e.g. |
| OXIDE | Laughing gas, for one |
| ANAESTHETIC | Laughing gas, e.g. |
| OXIDES | Laughing gas and water, chemically |
