There are 16 words that end with 'thful'.
| ruthful | deathful | loathful |
| mirthful | mouthful | faithful |
| slothful | truthful | worthful |
| wrathful | wrothful | youthful |
| healthful | unfaithful | untruthful |
| unhealthful | ||
Note: These 16 words that end with 'thful' are found from the USA & Canada version of the tournament Scrabble word list.