The term 'scale unit' can refer to a variety of units of measurement, including the OUNCE (5 letters), TON (3 letters), POUND (5 letters), and NOTE (4 letters). An OUNCE is a unit of mass or weight, typically used to measure small amounts of food or liquids. A TON is a unit of weight or mass, equal to 2, 000 pounds. A POUND is a unit of weight or mass, equal to 16 ounces. Finally, a NOTE is a unit of time, equal to one-sixteenth of a measure in music.