| Answer | Crossword Clue |
|---|---|
| thiolic | pertaining to sulphur (a non metallic element) |
| thionic | pertaining to sulphur (a non metallic element) |
| sulphur | a non metallic element / to treat with sulphur, also SULFUR |
| sulfur | a non metallic element / to treat with sulfur, also SULPHUR |
| boronic | pertaining to boron (a non-metallic element) |
| boric | pertaining to boron (a non-metallic element) |
| boracic | pertaining to boron (a non-metallic element) |
