| beat |
| befuddlement(noun, uncertainty, perplexity, bewilderment, puzzlement) |
| befuddling(noun, uncertainty, perplexity, bewilderment, puzzlement) |
| bemusement(noun, uncertainty, perplexity, bewilderment, puzzlement) |
| bewilder |
| blurring(noun, uncertainty, perplexity, bewilderment, puzzlement) |
| botch(trouble, disorder, difficulty, mess, jumble) |
| brainteaser(noun, challenge, question, puzzle, example) |
| bugaboo(noun, challenge, question, puzzle, example) |
| bustle(noun, trouble, difficulty, uncertainty, mistake) |
| chagrin(noun, uncertainty, perplexity, bewilderment, puzzlement) |
| challenge(noun, question, puzzle, mystery, conundrum) |
| check(noun, adversity, complication, complexity, complicatedness) |
| circularity |
| circumlocution |
| cleverness(noun, complexity) |
| cliff-hanger(noun, challenge, question, puzzle, example) |
| clutches |
| cluttering(noun, uncertainty, perplexity, bewilderment, puzzlement) |
| cobweb(noun, mess, tangle, complication, predicament) |