There are 18 words that end with 'cium'.
| aecium | calcium | zoecium |
| gynecium | lutecium | francium |
| indicium | silicium | zooecium |
| americium | gynaecium | gynoecium |
| androecium | apothecium | lawrencium |
| paramecium | endothecium | perithecium |
Note: These 18 words that end with 'cium' are found from the USA & Canada version of the tournament Scrabble word list.