-ose
Such as glucose, dextrose...
Sucrose is table sugar while lactose is dairy.
A common name for C6H12O6 is glucose, which is a simple sugar and a common source of energy in living organisms.
sugar - although it isn't all that accurate.
Sugar.
sugar
Sugar
table sugar
Sugar
Glucose...
Simple sugar
Since a noun is the name of a person, place, or thing, then yes, sugar is a common noun.
The common name for C6H8O7 is citric acid.