There are 11 words that start with 'thrif'.
| thrift | thrifts |
| thrifty | thriftier |
| thriftily | thriftiest |
| thriftless | thriftiness |
| thriftlessly | thriftinesses |
| thriftlessness | |
Note: These 11 words that start with 'thrif' are found from the USA & Canada version of the tournament Scrabble word list.