G-words. yo.

Here are some words I brainstormed starting with the letter g.

Galaxy
Gravity
Glass
Gears
Gyro
Gift
Grapple
Gradient
Green
Gravel
Glee
Group
Grate
Gaseous
Ground
Grave
Glue
Grain
Grease
Gaia
Gallery
Gemini
Gunman
General
Gutter
Gristle
Gram
Gi
Gum
Germs
Grass
Grotesque
Gamble

UPDATE:

I've worked the list into these pairs that I'm going to incorporate into an upcoming narrative:

Galaxy Galleria
Greased Gears
Golden Granule
Grounded Gemini
Gifted Gyro
Green Gaia
Grotesque General
Gutter Gravity

Gaseous Gradient
Grave Ground