grabber Synonyms

braintwister teaser subtlety stumper stickler sphinx snatcher seizer secret secrecy rune roun riddle rebus question twister usurper mindboggler tough nut to crack picker-upper cincher chiller brainteaser pinchgut koan grappler digitiser thriller puzzler capturer why puzzlement puzzle problem fascination enigma dilemma difficulty cryptogram crux clincher clasper charade challenge case argument apprehender annexationist grasper griper