slow
slower
late
later
funny
funnier
dark
darker
expensive
more expensive
beautiful
more beautiful
dirty
dirtier
pretty
prettier
difficult
more difficult
high
higher
thin
thinner
busy
busier
young
younger
small
smaller
cold
colder
crowded
more crowded
famous
more famous
fast
faster
interesting
more interesting
popular
more popular
hot
hotter
wide
wider
deep
deeper
delicious
more delicious
important
more important
loud
louder