| body(noun, measure, question, quantity, content) |
| challenge(noun, case, examination, problem, knot) |
| corner(noun, business, thing, challenge, case) |
| crux(noun, challenge, case, question, content) |
| cryogeny(noun, study, science, education) |
| crystallography(noun, study, science, education) |
| debate(noun, account, question, content, motive) |
| electromagnetics(noun, study, science, education) |
| electromagnetism(noun, study, science, education) |
| electronics(noun, study, science, education) |
| electrostatics(noun, study, science, education) |
| fix(noun, business, thing, challenge, case) |
| hole(noun, business, thing, challenge, case) |
| jam(noun, business, thing, challenge, case) |
| mechanics(noun, study, science, education) |
| nucleonics(noun, study, science, education) |
| optics(noun, study, science, education) |
| pickle(noun, business, thing, challenge, case) |
| predicament(noun, business, thing, challenge, case) |
| rheology(noun, study, science, education) |