| reconnoiter(verb, examine, case, discover, watch) |
| ride shotgun for(verb, expression, idiom, cover, keep) |
| safeguard(verb, cover, keep, secure, observe) |
| save(verb, cover, keep, secure, observe) |
| scout(verb, examine, case, discover, watch) |
| screen(verb, cover, keep, secure, observe) |
| scrutinize(verb, examine, discover, watch, pry) |
| secretly follow(verb, expression, examine, case, discover) |
| secure(verb, cover, keep, observe, defend) |
| see after(verb, expression, cover, keep, secure) |
| set eyes on(verb, expression, idiom, examine, discover) |
| shadow(verb, examine, case, discover, watch) |
| shelter(verb, cover, keep, secure, observe) |
| shepherd(verb, cover, keep, secure, observe) |
| shield(verb, cover, keep, secure, observe) |
| shotgun(verb, cover, keep, secure, observe) |
| sleuth(verb, examine, case, discover, watch) |
| snoop(verb, examine, case, discover, watch) |
| spot(verb, examine, discover, watch, scrutinize) |
| spy on(verb, expression, examine, discover, watch) |