| NATRIUM | An old name for sodium (7) |
| CAUSTIC | ____ soda, another name for sodium hydroxide used in making soap (7) |
| SULPHUR | Brimstone is an old name for which element? (7) |
| VITRIOL | What is an old name for sulphuric acid? (7) |
| STIBIUM | An old name for the semi-metal antimony (7) |
| SHAWLIE | From an item of clothing, an old name for a working-class woman |
| AURELIA | From "gold", a genus of medusas that includes the saucer jellyfish; or, alluding to its golden colour, an old name for a butterfly's chrysalis (7) |
| SEACALF | An old name for a common seal |
| TIERCES | An old name for thirds, in music or some measurements |
| PALFREY | An old name for a docile horse, often ridden by women |
| ABIGAIL | A wife of David in the Bible, an old name for a lady's maid |
| CAUSTICSODA | Alternative name for sodium hydroxide, used in the manufacture of soap, paper, detergents etc. (7,4) |
| BAKINGSODA | Common name for sodium bicarbonate (6,4) |
| NEMBUTAL | Proprietary name for sodium pentobarbitone |
| SALT | Common name for sodium chloride |
| LYE | Common name for sodium hydroxide |
| SHOCK | From an old name for a shaggy-coated poodle, a word for a thick mop of hair; or, an abrupt perturbation (5) |
| OLIVE | Tree whose branches symbolise peace; yellowish-green colour; or, an old name for an oystercatcher (5) |
| BINGO | The playing of all seven tiles in a single turn in Scrabble; an old name for brandy; the game housey-housey; or, by extension, a word used as an interjection of success/discovery (5) |
| URCHIN | From the Latin for "hedgehog", an old name for said spiny beast (6) |
