angry
angrier
young
younger
large
larger
slim
slimmer
busy
busier
sad
sadder
poor
poorer
mad
madder
creepy
creepier
silly
sillier
far
further/farther
soft
softer
happy
happier
icy
icier
clumsy
clumsier
nasty
nastier
friendly
friendlier
thin
thinner
healthy
healthier
bad
worse
easy
easier
good
better
long
longer