| spot(noun, business, thing, challenge, case) |
| thermodynamics(noun, study, science, education) |
| trouble(noun, business, thing, challenge, case) |
| uranology(noun, study, science, education) |
| Gordian knot(noun, expression, challenge, case, problem) |
| sticky wicket(noun, expression, challenge, case, problem) |
| ball of wax(noun, expression, business, thing, matter) |
| flash point(noun, expression, business, thing, matter) |
| subject matter(noun, expression, question, content, motive) |
| talking point(noun, expression, question, content, motive) |
| zero hour(noun, expression, business, thing, matter) |
| account(noun, debate, deliberation, advisement) |
| advisement(noun, account, debate, deliberation) |
| agonizing(noun, account, debate, deliberation, advisement) |
| amount(noun, measure, quantity, volume) |
| argument(noun, question, content, motive, motif) |
| audit(noun, examination, disquisition, delving, examen) |
| basis(noun, question, content, motive, motif) |
| bottom(noun, question, content, motive, motif) |
| brainteaser(noun, challenge, case, problem, knot) |