There are 16 words that end with 'tuous'.
| fatuous | fastuous | tortuous |
| unctuous | virtuous | fructuous |
| impetuous | sumptuous | incestuous |
| spirituous | tumultuous | voluptuous |
| anfractuous | tempestuous | contemptuous |
| presumptuous | ||
Note: These 16 words that end with 'tuous' are found from the USA & Canada version of the tournament Scrabble word list.