| read(verb, study, consider, examine, review) |
| research(noun, verb, study, consider, examine) |
| review(noun, verb, study, consider, examine) |
| run down(verb, expression, phrasal verb, study, consider) |
| scout(verb, study, consider, examine, review) |
| scrutinize |
| scrutiny(noun, bug, investigation, monitor, tap) |
| secret police |
| secret service |
| sift(verb, study, consider, examine, review) |
| sit in on(expression, idiom) |
| snoop(verb, bug, spy, monitor, poke) |
| solicit |
| stake out(verb, expression, phrasal verb, study, consider) |
| study |
| superintendence(noun, bug, scrutiny, investigation, monitor) |
| supervision(noun, bug, scrutiny, investigation, monitor) |
| surveyance(noun, bug, scrutiny, investigation, monitor) |
| tab(noun, bug, scrutiny, investigation, monitor) |
| tail(noun, bug, scrutiny, investigation, monitor) |