teaspoon: a small spoon used for stirring tea or coffee; holds about one fluid dram
spoon: a piece of cutlery with a shallow bowl-shaped container and a handle; used to stir or serve or take up food
saber saw: a portable power saw with a reciprocating blade; can be used with a variety of blades depending on the application and kind of cut; generally have a plate that rides on the surface that is being cut