| astronautics(noun, expression, study, science, education) |
| atomic physics(noun, expression, study, science, education) |
| consideration(noun, business, thing, account, question) |
| high-energy physics(noun, expression, study, science, education) |
| high energy physics(noun, expression, study, science, education) |
| issue(noun, business, thing, challenge, case) |
| nuclear physics(noun, expression, study, science, education) |
| particle physics(noun, expression, study, science, education) |
| plasma physics(noun, expression, study, science, education) |
| problem(noun, business, thing, challenge, case) |
| question(noun, challenge, case, content, examination) |
| solid-state physics(noun, expression, study, science, education) |
| statistical mechanics(noun, expression, study, science, education) |
| hot water(noun, expression, business, thing, challenge) |
| astronomy(noun, study, science, education) |
| cryogenics(noun, study, science, education) |
| enigma(noun, challenge, case, problem, knot) |
| aeronautics(noun, study, science, education) |
| affair(noun, business, thing, question, matter) |
| biophysics(noun, study, science, education) |