WHAT DO YOU CALL:
1. A body of water, smaller than a river, contained within relatively narrow banks.
stream
2. What the thing you push around the grocery store is called.
shopping cart
3. A metal container to carry a meal in.
lunchbox
4. The thing that you cook bacon and eggs in.
frying pan
5. The piece of furniture that seats three people.
sofa
6. The device on the outside of the house that carries rain off the roof.
gutter
7. The covered area outside a house where people sit in the evening.
porch
8. Carbonated, sweetened, non-alcoholic beverages.
soda
9. A flat, round breakfast food served with syrup.
pancake
10. A long sandwich designed to be a whole meal in itself.
hoagie
11. The piece of clothing worn by men at the beach.
swimsuit
12. Shoes worn for sports.
sneakers, athletic shoes
13. Putting a room in order.
cleaning up
14. A flying insect that glows in the dark.
firefly
15. The little insect that curls up into a ball.
potato bug
16. The children's playground equipment where one kid sits on one side and goes up while the other sits on the other side and goes down.
seesaw, teeter-totter
17. How do you eat your pizza?
Holding on to the crust, starting from the pointy end.
18. When private citizens put up signs and sell their used stuff.
garage sale
19. The evening meal.
dinner
20. The thing under a house where the furnace and perhaps a rec room are.
basement
21. An unusually heavy rain which does not last long.
thunderstorm, rainstorm, "wow, it's really pouring out" :-)
22. A window covering on rollers that pulls down.
windowshade or shade, depending on the context. I'd be likely to use "windowshade" in more formal situations or where it's less clear what I'm likely to be talking about (as in, "I should go buy some new windowshades for the dining room"), while I might use "shade" in situations where the context is clear ("Wow, the sun's really blinding. Could you please lower the shade behind you?").
23. A new, limited access, multi-lane road.
highway
For me, the general term is always highway. I only use other terms when referring to a specific road, such as, "the GW Parkway" or "Interstate 95".
24. Heavy garments worn for work.
I'm not sure what is meant here. Coveralls have sleeves, overalls don't.
25. An area of trees, greater than an acre.
forest
26. The highest grade of gasoline.
premium
27. A drink made of ice cream put through the blender.
milkshake