rebus Synonyms

braintwister stumper stickler sphinx secret secrecy rune riddle rebuses question puzzlement subtlety teaser twister brain-twister awkward problem mindboggler tough nut to crack chiller brainteaser whodunit brain-teaser word game thriller puzzle problem poser conundrum charade chaos case bewilderment argument anagram ambiguity affair abstrusity crux cryptogram difficulty perplexity oracle occult mystification mystery logogriph inscrutableness inscrutability grabber enigma