There are 13 words that end with 'sium'.
| cesium | caesium | hassium |
| indusium | dichasium | gymnasium |
| magnesium | epimysium | potassium |
| symposium | dysprosium | perimysium |
| monochasium | ||
Note: These 13 words that end with 'sium' are found from the USA & Canada version of the tournament Scrabble word list.