The comparative form of thin is thinner.
Comparative: thinner Superlative: thinnest
thinner
It is thinner.
thinner
The comparative form of busy is busier.
The comparative form of friendly is friendlier.
The comparative form of dreamy is dreamier
comparative form is cleaner superlative form is cleanest
The comparative form of many is more
The comparative form of "central" is "more central."
thinner, thinnest
The comparative form of "clean" is "cleaner."