Incredible is an adjective. Some synonyms are amazing, spontaneous, great, good, fantastic, and newsworthy.
No, "most interesting" is the superlative form.The comparative form is "more interesting".
The superlative is cloudiest; the comparative is cloudier.
comparative : purer superlative : purest
Comparative: older Superlative: oldest
What is the comparative and superlative of Often
The comparative and superlativeforms of grand are: Comparative: grander Superlative: grandest
comparative - merrier superlative - merriest
comparative = sadder superlative = saddest
The comparative is "stricter" and the superlative is "strictest".
Comparative: shallower Superlative: shallowest
The comparative is greater and the superlative is greatest.
comparative straighter and the superlative the straightest