naysayer Synonyms

cynic doubter pessimist worrywart wet blanket killjoy downer negativist detractor worrier skeptic sceptic faultfinder cassandra defeatist biggest stick-in-the-mud big sourpuss worryguts sourpuss prophet of doom diehard contrarian bah humbug doomsayer angel's advocate refuter refuser quibbler dissident dissenter disputant denier adversary critic complainer arguer antagonist gloomy heretic litigant protester oppositionist opposer obstructionist objector nonconformist nihilist misfit misanthrope anomaly