Adjectives and adverbs have comparative and superlative degrees. The comparative degree expresses a higher degree of a quality, but not the highest possible (e.g., braver; more fiercely). The superlative degree expresses the highest or a very high degree of a quality (e.g., bravest, most fiercely).
comparative : purer superlative : purest
Comparative: older Superlative: oldest
Dative; Early Comparative; Earlier Superlative; Earliest
The comparative and superlativeforms of grand are: Comparative: grander Superlative: grandest
comparative - merrier superlative - merriest
Comparative: shallower Superlative: shallowest
The comparative is "stricter" and the superlative is "strictest".
comparative = sadder superlative = saddest
The comparative is greater and the superlative is greatest.
comparative - rockier superlative - rockiest
Comparative - better Superlative - best
Comparative is more and superlative is most.