| Caustic agent | 13 |
| Caustic chemical | 16 |
| Caustic soda | 12 |
| Caustic cleaner | 15 |
| Drano ingredient | 16 |
| Strong cleaner | 14 |
| Sodium hydroxide | 16 |
| Potassium hydroxide, e.g. | 25 |
| Lixivium | 8 |
| Caustic potash | 14 |
| Soap-making need | 16 |
| Potassium hydroxide | 19 |
| Old soap ingredient | 19 |
| Drain-cleaning chemical | 23 |
| Strong sodium solution | 22 |
| Strong cleanser | 15 |
| Potassium hydroxide solution | 28 |
| Drain cleaner ingredient | 24 |
| Bleaching agent | 15 |
| Wood ash product | 16 |
| Soapmaking stuff | 16 |
| Soapmaking caustic | 18 |
| Oven cleaner component | 22 |
| Caustic used in soapmaking | 26 |
| Alkaline solution | 17 |
| Soapmaker's solution | 24 |
| Soapmaker's need | 20 |
| Soap component | 14 |
| NaOH | 4 |
| Hydroxide solution | 18 |
| Drain opener | 12 |
| Drain cleaner | 13 |
| Caustic cleanser | 16 |
| Bleaching solution | 18 |
| What real lutefisk is soaked in | 31 |
| Strong solution | 15 |
| Strong alkaline solution | 24 |
| Strong alkali | 13 |
| Solution in soap and frosted glass | 34 |
| Soap-making ingredient | 22 |
| Soap stuff | 10 |
| Soap maker's need | 21 |
| Lutefisk soaking agent | 22 |
| Heavy-duty cleanser | 19 |
| Cleaning substance | 18 |
| Chemical in Drano | 17 |
| Caustic compound | 16 |
| Caustic cleansing agent | 23 |
| Caustic application | 19 |
| Alkaline soap ingredient | 24 |
| Alkali in cleansers | 19 |
| Toothpaste ingredient | 21 |
| Strong soap ingredient | 22 |
| Strong drain cleaner | 20 |
| Solution for a clogged drain | 28 |
| Solid caustic | 13 |
| Sodium hydroxide, familiarly | 28 |
| Sodium hydroxide solution | 25 |
| Soapmaking need | 15 |
| Soapmaker's supply | 22 |
| Soapmaker's caustic need | 28 |
| Soap-making stuff | 17 |
| Soap substance | 14 |
| Soap solution | 13 |
| Soap ingredient, once | 21 |
| Pipe cleaner? | 13 |
| Oven-cleaner ingredient | 23 |
| Oven cleaner ingredient | 23 |
| NaOH solution | 13 |
| More common name for caustic soda | 33 |
| Lutefisk tenderizer | 19 |
| Leaching solution | 17 |
| Leaching product | 16 |
| It's obtained by leaching | 29 |
| It leaches and bleaches | 23 |
| Drain-cleaner chemical | 22 |
| Drain unclogger | 15 |
| Drain cleaner component | 23 |
| Common name for sodium hydroxide | 32 |
| Clog remover | 12 |
| Cleansing solution | 18 |
| Caustic matter | 14 |
| Caustic material | 16 |
| Caustic drain opener | 20 |
| Caustic chemical used in making soap | 36 |
| Caustic alkali | 14 |
| Burning substance | 17 |
| Burn cause, perhaps | 19 |
| Alkaline liquid | 15 |
| Washing substance | 17 |
| Tough cleaner | 13 |
| Stuff used to cure green olives | 31 |
| Stuff in soap | 13 |
| Strong solution of sodium | 25 |
| Strong cleaning solution | 24 |
| Strong alkaline | 15 |
| Solution used in ablutions | 26 |
| Solution obtained by lixiviation | 32 |
| Solution for leaching | 21 |
| Sodium or potassium hydroxide | 29 |