ninja Synonyms

shinobi assassin spy secret agent clever clogs highbrow idiot savant kunoichi martial artist bright spark brainbox alpha geek egghead brains ninjutsu ninjitsu brainiac superspy warrior of the night master of invisibility walker of shadows hidden warrior covert operative underground fighter mental giant brilliant person walking encyclopedia bounty hunter boffin magician maestro killer intellectual intellect gladiator genius fighter expert duelist combatant buff bravo brain master preempt polymath rocket scientist mastermind stealth fighter einstein