There are 16 words that end with 'dious'.
| odious | tedious |
| studious | melodious |
| insidious | invidious |
| commodious | fastidious |
| perfidious | compendious |
| unmelodious | incommodious |
| unfastidious | overfastidious |
| hyperfastidious | ultrafastidious |
Note: These 16 words that end with 'dious' are found from the USA & Canada version of the tournament Scrabble word list.