The comparative form is cleaner- That car is cleaner than mine.
cleaner
cleaner, cleanest
The comparative form of busy is busier.
Teapot is a noun and, as such, does not have a comparative degree.
Comparative: Whiter Superlative: Whitest
The comparative form of longest is longer.
The comparative and superlative degrees of clean are cleaner and cleanest.
Cleaner
so clean as.
more clean, cleaner
comparative form is cleaner superlative form is cleanest
cleaner
Cleaner
They are cleaner and cleanest.
cleaner, cleanest
cleaner
They are cleaner and cleanest.
Cleanest is the superlative degree of the word clean. Cleaner is the comparative degree