| question(noun, study, knowledge, investigation) |
| questionary(noun, study, knowledge, investigation) |
| questionnaire(noun, study, knowledge, investigation) |
| quiz(noun, study, knowledge, investigation) |
| rehearing(noun, study, knowledge, investigation) |
| reinvestigation(noun, study, knowledge, investigation) |
| research and development(expression, research, investigation, learning) |
| research mix(expression, research, investigation, learning) |
| research rationale(expression, research, investigation, learning) |
| sample inquiry(expression, information, investigation, inquiry) |
| scientific article(expression, research, investigation, learning) |
| scientific examination(expression, research, investigation, learning) |
| scientific treatise(expression, research, investigation, learning) |
| scope of inquiry(expression, information, investigation, inquiry) |
| self-examination(noun, study, knowledge, investigation) |
| self-exploration(noun, study, knowledge, investigation) |
| self-questioning(noun, study, knowledge, investigation) |
| self-reflection(noun, study, knowledge, investigation) |
| self-scrutiny(noun, study, knowledge, investigation) |
| soul-searching(noun, study, knowledge, investigation) |