Kilogram
Part of speech: noun
Definition: In the International System of Units, the base unit of mass; the mass of a specific cylinder of platinum-iridium alloy kept at the International Bureau of Weights and Measures in France. Symbol: kg Hence, the unit of weight such that one-kilogram mass is also a one-kilogram weight.
Kilo
Part of speech: noun
Definition: Short form of kilogram.The letter K in the ICAO spelling alphabet.