For the word "sick, the comparative is "sicker" and the superlative is "sickest."
sicker, sickest
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."
sicker
sicker, sickest
The comparative form of "clean" is "cleaner."
The comparative form of friendly is friendlier.
Wiser is the comparative form; wisest is the superlative.