quiet
quieter - the quietest
few
fewer - the fewest
good
better - the best
bad
worse - the worst
careful
more careful - the most careful
ugly
uglier - the ugliest
far
farther - the farthest
little
less - the least
interesting
more interesting - the most interesting
hot
hotter - the hottest
fast
faster - the fastest
much/many
more - the most
slow
slower - the slowest
attractive
more attractive - the most attractive
clean
cleaner - the cleanest
nice
nicer - the nicest
big
bigger - the biggest
crowded
more crowded - the most crowded
beautiful
more beautiful - the most beautiful
healthy
healthier - the healthiest
famous
more famous - the most famous