| optical physics(noun, expression, form, study, science) |
| optics(noun, form, study, science, field) |
| organic geochemistry(noun, expression, study, treatment, science) |
| ornithology(noun, study, science, aspect, phenomenon) |
| paleobiology(noun, study, science, determination, field) |
| paleoclimatology(noun, study, treatment, science, knowledge) |
| pathobiology(noun, study, science, determination, field) |
| pathology(noun, study, science, determination, field) |
| peer review(noun, expression, study, science, aspect) |
| petrochemistry(noun, study, treatment, science, knowledge) |
| petrology(noun, study, treatment, science, knowledge) |
| phylogeny(noun, study, science, determination, field) |
| physical anthropology(noun, expression, study, science, aspect) |
| physical cosmology(noun, expression, form, study, science) |
| physical law(noun, expression, study, science, aspect) |
| physiology(noun, study, science, determination, field) |
| phytochemistry(noun, study, treatment, science, knowledge) |
| phytopathology(noun, study, science, determination, field) |
| planetary geology(noun, expression, study, treatment, science) |
| planetary science(noun, expression, form, study, science) |