Greenish, Greenness, Greens, Greeny.
Uhh . . . the word "green" starts with a G. As in Green Bay. You know, G for Green Bay? I hope this is clear enough.
Gossip ???
Gravid is the word.
grass is green and starts with g
Green Going Great etc.
GEAR!
Graphic?
grummpy
Gothic
grandma
grill or gratinate
a gurney