There are 18 words that start with 'gear'.
gear | gears | geared |
gearbox | gearing | gearcase |
gearhead | gearings | gearless |
gearboxes | gearcases | gearheads |
gearshift | gearwheel | gearchange |
gearshifts | gearwheels | gearchanges |
Note: These 18 words that start with 'gear' are found from the USA & Canada version of the tournament Scrabble word list.