There are 20 words that start with 'grub'.
| grub | grubs | grubby |
| grubbed | grubber | grubbers |
| grubbier | grubbily | grubbing |
| grubworm | grubbiest | grubstake |
| grubworms | grubbiness | grubstaked |
| grubstaker | grubstakes | grubstakers |
| grubstaking | grubbinesses | |
Note: These 20 words that start with 'grub' are found from the USA & Canada version of the tournament Scrabble word list.