What is the difference between a rain forest and a jungle?

There is a difference between rainforest and jungle, though this doesn't have much to do with rainfall. Jungle areas typically surround rainforest areas, and have a key difference that has little to do with climate. The biggest distinction is that rain forests have an incredibly thick canopy of very tall trees. This means there are far fewer plants at ground level. Trees block out much of the light that would be required by most plants to thrive, so you will usually only find shade loving ground plants in rain forest areas.