Stupid - adjective Stupider - comparative form of 'stupid' - alternative 'more stupid' Stupidest - superlative form of 'stupid - alternative 'most stupid'
Stupid - adjective Stupider - comparative form of 'stupid' - alternative 'more stupid' Stupidest - superlative form of 'stupid - alternative 'most stupid'
Try running stupider & stupidest by an English teacher reffy ....
Chances are that they are defined in the dictionary as modern adjectives, yet frowned upon in literary terms.