Cassandra Eeyore bitter-ender brawler calamity howler cynic defeatist defendant diehard disputant dissentient dissident filibuster filibusterer frustrater hinderer impeder intransigent irreconcilable killjoy last-ditcher litigant malist marplot naysayer nihilist noncooperator objector obstructer obstructionist obstructive opposer oppositionist pessimist plaintiff prophet of doom protester quarreler resister retreatist scrapper seek-sorrow thwarter worrywart wrangler