The comparative degree is wider.
busier, busiest
They are "busier" and "busiest".
keener
lesser
Neither. It's the positive degree.
The comparative form of busy is busier.
The comparative form of busy is busier.
The comparative form of "busy" is "busier."
busier
Teapot is a noun and, as such, does not have a comparative degree.
The comparative degree is wider.
"Less" is the comparative degree of little.
The comparative degree of "holy" is "holier."
Thriftier is the comparative degree of thrifty.
The comparative degree of "light" is "lighter."
The comparative degree for "lush" is "lusher."