superwelterweight

As a noun terms

is .

As an adjective superwelterweight is

(boxing) pertaining to a weight class between 677 and 699 kilograms, at the boundary between middleweight and welterweight.

As adjectives the difference between welterweight and superwelterweight

is that welterweight is while superwelterweight is (boxing) pertaining to a weight class between 677 and 699 kilograms, at the boundary between middleweight and welterweight.

As a noun welterweight

is .

As a noun middleweight

is (uncountable) a weight division in professional boxing between light middleweight or welterweight and super middleweight or cruiserweight; a similar division in wrestling and other sports.

As an adjective superwelterweight is

(boxing) pertaining to a weight class between 677 and 699 kilograms, at the boundary between middleweight and welterweight.

As a noun kilogram

is in the International System of Units, the base unit of mass; conceived of as the mass of one liter of water, and now defined as the mass of a specific cylinder of platinum-iridium alloy kept at the International Bureau of Weights and Measures in France. Symbol: kg.

As an adjective superwelterweight is

pertaining to a weight class between 67.7 and 69.9 kilograms, at the boundary between middleweight and welterweight.