cheap
cheaper - the cheapest
difficult
more difficult - the most difficult
tall
taller - the tallest
boring
more boring - the most boring
high
higher - the highest
expensive
more expensive - the most expensive
fast
faster - the fastest
big
bigger - the biggest
funny
funnier - the funniest
kind
kinder - the kindest
dangerous
more dangerous - the most dangerous
small
smaller - the smallest
good
better - the best
low
lower - the lowest
beautiful
more beautiful - the most beautiful
intelligent
more intelligent - the most intelligent
strong
stronger - the strongest
exciting
more exciting - the most exciting
bad
worse - the worst
short
shorter - the shortest
safe
safer - the safest
easy
easier - the easiest
friendly
friendlier - the friendliest