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 = sadder superlative = saddest
Comparative: shallower Superlative: shallowest
The comparative is "stricter" and the superlative is "strictest".
The comparative is greater and the superlative is greatest.
Comparative: Whiter Superlative: Whitest
"Bit" is a noun and a verb and, as such, does not have a comparative or superlative form.
Luckier, luckiest. Luckily doesn't have comparative and superlative forms but the comparative and superlative of lucky are as above.