harder, hardest
as hard as, so hard as, less hard as, more hard as, hard, harder, the hardest.
softer
Harder and hardest
harder hardest
hardest, harder
harder, hardest
The three degrees (of comparison) for adjectives are Positive, Comparative and Superlative. Example: hard (positive) harder (comparative) hardest (superlative)
No, they are just synonyms. The comparative of difficultis more difficult (the superlative is the most difficult). The comparative of hard is harder (the superlative is the hardest).
comparative : purer superlative : purest
The superlative is cloudiest; the comparative is cloudier.
Comparative: older Superlative: oldest
The comparative and superlativeforms of grand are: Comparative: grander Superlative: grandest