There are 21 words that start with 'grue'.
| grue | gruel |
| grues | gruels |
| grueled | grueler |
| gruelers | grueling |
| gruelled | grueller |
| gruesome | gruelings |
| gruellers | gruelling |
| gruesomer | gruelingly |
| gruellings | gruesomely |
| gruesomest | gruesomeness |
| gruesomenesses | |
Note: These 21 words that start with 'grue' are found from the USA & Canada version of the tournament Scrabble word list.