| investigation(noun, examination, disquisition, delving, examen) |
| juncture(noun, business, thing, matter, affair) |
| kernel(noun, question, content, motive, motif) |
| keynote(noun, question, content, motive, motif) |
| knot(noun, challenge, case, problem) |
| lookout(noun, business, thing, matter, affair) |
| main(noun, question, content, motive, motif) |
| many(noun, measure, quantity, amount, volume) |
| marrow(noun, question, content, motive, motif) |
| mass(noun, question, content, motive, motif) |
| matter(noun, question, content, motive, motif) |
| measure(noun, quantity, amount, volume) |
| meditation(noun, account, debate, deliberation, advisement) |
| mire(noun, challenge, case, problem, knot) |
| motif(noun, question, content, motive) |
| motive(noun, question, content, motif) |
| mystery(noun, challenge, case, problem, knot) |
| net(noun, question, content, motive, motif) |
| nub(noun, question, content, motive, motif) |
| nubbin(noun, question, content, motive, motif) |