Alot of people including me seem to be having problems with the contra one, what i found to work is wait till you have all the other achievements then do the jmtb02 one first then try typing in contra.
You all are complaining about the words yet i havent seen a single word that wasnt a real word....wizard,television,assassin,tiki,newgrounds...all real words...
 "Achievement Unlocked"){kind=icon}
 "Hangman Extreme!"){kind=icon}
 "SuitedCriminals' Dating Sim"){kind=icon}