A small one is called a cascade and a large one a cataract. What are they?

What name belongs to both a Hawaiian hawk and a moon of Jupiter? What is a small hole or wound made by a sharp object called? What is a small, lightly armed patrol boat called? What small nonflowering plant has types called hair cap and peat? What small oval gland at the base of the brain is called the "master gland"? What do you call a small grand piano about 5 feet long? What is a small porch or steps leading to the entrance of a house called? What word names a small quantity you might pat on with a finger?