sault / sou / sous / sue / xu [su:]
sault – n. – large rapids or waterfalls
sou – n. – 1. a French coin of low value; 2. a very small amount of money
sous – adj. – someone ranking second in command
sue – v. – 1. institute legal proceedings against a person; 2. entreat; 3. make a legal petition
xu – n. – a Vietnamese coin worth 1/100th of a dong, it is seldom used currently