| trouble(noun, calm, order, benefit, issue) |
| problem(noun, trouble, help, difficulty, agreement) |
| question(noun, trouble, issue, doubt, problem) |
| doubt(noun, calm, trouble, issue, question) |
| issue(noun, trouble, challenge, case, doubt) |
| dilemma(noun, trouble, issue, doubt, question) |
| difficulty(noun, trouble, help, favor, ease) |
| mystery(noun, adjective, quality, question, need) |
| can of worms(expression, noun, trouble, issue, doubt) |
| knot(noun, hard, difficulty, challenge, case) |
| mess(noun, trouble, hard, difficulty, issue) |
| riddle(noun, difficult, question, problem, puzzle) |
| puzzle(noun, difficult, question, problem, lost) |
| bad situation(expression, noun, trouble, issue, doubt) |
| disputed point(expression, noun, trouble, issue, doubt) |
| cliff-hanger(noun, informal, question, puzzle, conundrum) |
| disagreement(noun, trouble, issue, doubt, question) |
| disconnection(noun, division, separation, singularity) |
| dispute(noun, trouble, issue, doubt, question) |
| hitch(noun, trouble, issue, doubt, question) |