cold - colder (than) - the coldest
safe - safer (than) - the safest
hot - hotter (than) - the hottest
windy - windier (than) - the windiest
expensive - more expensive (than) - the most expensive
good - better (than) - the best
bad - worse (than) - the worst
far - farther (than) / further (than) - the farthest / the furthest
