There are 18 words that end with 'tium'.
| ostium | protium |
| tritium | cymatium |
| lutetium | solatium |
| hospitium | strontium |
| syncytium | consortium |
| nasturtium | sclerotium |
| pancratium | sestertium |
| spermatium | technetium |
| unnilpentium | radiostrontium |
Note: These 18 words that end with 'tium' are found from the USA & Canada version of the tournament Scrabble word list.