There are 17 words that start with 'groo'.
groom | grooms | groove |
groovy | groomed | groomer |
grooved | groover | grooves |
groomers | grooming | groovers |
groovier | grooving | groomsman |
groomsmen | grooviest | |
Note: These 17 words that start with 'groo' are found from the USA & Canada version of the tournament Scrabble word list.