Hot - hotter - the hottest
Long - longer - the longest
Short - shorter - the shortest
Clever - cleverer - the cleverest
Silly - sillier - the silliest
Great - greater - the greatest
Red - redder - the reddest
Black - blacker - the blackest
White - whiter - the whitest
Thin - thinner - the thinnest
Thick - thicker - the thickest
Fat - fatter - the fattest
Nice - nicer - the nicest
Warm - warmer - the warmest
Cold - colder - the coldest
Merry - merrier - the merriest
Small - smaller - the smallest
Tall - taller - the tallest
High - higher - the highest
Weak - weaker - the weakest
Strong - stronger - the strongest
Heavy - heavier - the heaviest
Light - lighter - the lightest
Green - greener - the greenest
Dry - drier - the driest
Clean - cleaner - the cleanest
Dirty - dirtier - the dirtiest
Wide - wider - the widest
Deep - deeper - the deepest
Brace - braver - the bravest