Analogy is the drawing of a comparison in order to show a similarity in some respect; "the operation of a computer presents and interesting analogy to the working of the brain"; "the models show by analogy how matter is built up" 

1. In is to out as Up is to Down
2. Go is to Green as Red is to Stop
3. Wheel is to Bike as Tire is to Car
4. Land is to Dirt as Ocean is to Water
5. Apple is to Tree as Flower is to Plant
6. Toe is to Foot as Finger is to Hand
7. Day is to Month as Minute is to Hour
8. Purple is to Grapes as Red is to Cherries
9. Word is to Sentence as Page is to Book
10. Small is to Large as Little is to Big