The term 'heavy weight' can be represented by five different crossword solutions: TON (3 letters), TONNE (5 letters), ONUS (4 letters), ONETON (6 letters), and SHORTTON (8 letters). A TON is a unit of measurement that is equal to 2, 000 pounds, while a tonne is a metric unit of measurement that is equal to 1, 000 kilograms. An ONUS is a burden or responsibility, while an oneton is a unit of measurement that is equal to 2, 000 pounds. Finally, a shortton is a unit of measurement that is equal to 2, 000 pounds, but is used mainly in the United States.