more harmful, most harmful
The comparative and superlative forms of gentle are gentler and gentlest.
Riper and ripest are the comparative and superlative forms of ripe.
harmful
The comparative forms of loudly, as with any other adverb, are simple: Comparative: more loudly Superlative: most loudly The comparative forms of loud are: Comparative: louder Superlative: loudest
the comparative and superlative forms of the word near are nearer(in comparative form) and nearest(in superlative form).
Larger and largest are the comparative and superlative forms of large.
Comparative: unrulier Superlative: unruliest
The comparative and superlative forms of handsome are more handsome and most handsome.
The comparative and superlative forms of modern are more modern and most modern.
More beautiful and most beautiful are the comparative and superlative forms of beautiful.
Luckier, luckiest. Luckily doesn't have comparative and superlative forms but the comparative and superlative of lucky are as above.
comparative is more and superlative is most.