There are 15 words that start with 'ruth'.
| ruth | ruths |
| ruthful | ruthenic |
| ruthless | ruthenium |
| ruthfully | rutheniums |
| ruthlessly | ruthfulness |
| ruthlessness | rutherfordium |
| ruthfulnesses | rutherfordiums |
| ruthlessnesses | |
Note: These 15 words that start with 'ruth' are found from the USA & Canada version of the tournament Scrabble word list.