There are 18 words that start with 'group'.
| group | groups | grouped |
| grouper | groupie | groupers |
| groupies | grouping | groupoid |
| groupable | groupings | groupoids |
| groupware | groupthink | groupwares |
| groupthinks | groupuscule | groupuscules |
Note: These 18 words that start with 'group' are found from the USA & Canada version of the tournament Scrabble word list.