There are 12 words that start with 'hardi'.
| hardier | hardies |
| hardily | hardiest |
| hardihood | hardiment |
| hardiness | hardihoods |
| hardiments | hardinesses |
| hardinggrass | hardinggrasses |
Note: These 12 words that start with 'hardi' are found from the USA & Canada version of the tournament Scrabble word list.