Slow
slower - the slowest
Fun
more fun - the most fun
Smart
smarter - smartest
Busy
busier - the busiest
Crazy
crazier - craziest
Cute
cuter - cutest
Sleepy
sleepier - sleepiest
Angry
angrier - the angriest (or more angry - the most angry)
Good
better - the best
Strong
stronger - strongest
Hot
hotter - the hottest
Successful
more successful - most successful
Dangerous
more dangerous - the most dangerous
Average
more average - the most average
Fast
faster - the fastest
Loud
louder - loudest
Relaxed
more relaxed - the most relaxed
Hungry
hungrier - hungriest
Surprised
more surprised - most surprised
Bad
worse - the worst
Wet
wetter - wettest
Funny
funnier - the funniest
Cool
cooler - the coolest
Big
bigger - biggest
Scared
more scared - the most scared
Sad
sadder - the saddest
Cold
colder - the coldest
Rich
richer - richest