The Olympic Games originated in ancient Greece. You can make green paint by mixing blue and yellow paint. A greenhouse is a building, usually made out of glass, in which people grow plants. The greyhound is the fastest breed of dog for short distance runs. A grin is a kind of smile that shows your teeth.
People grin when they have a lot of different feelings.
The grizzly bear is a large bear with a muscular hump on its shoulders. The groundhog is a rodent that is also called the woodchuck. Groundhog Day Groundhog Day is a holiday celebrated in February 2nd. The guinea pig is a small, tailless rodent that is sometimes kept as a pet. A guitar is a stringed instrument.