| survey(verb, mark, consider, see, note) |
| tail(noun, verb, follow, discover, watch) |
| tap(verb, study, consider, examine, review) |
| tattler(grass, sneak, decoy, informer, informant) |
| tattletale(grass, sneak, decoy, informer, informant) |
| traducer(noun, opposition, agent, villain, rebel) |
| undercover man |
| whistle-blower(grass, decoy, informer, turncoat, conspirator) |
| wiretap(verb, study, consider, examine, review) |
| Benedict Arnold(noun, expression, informer, rat, turncoat) |
| Sherlock Holmes(expression, agent, hound, police, informer) |
| adversary(noun, opposition, agent, rebel, criminal) |
| advertise(verb, mark, see, respect, note) |
| analyst(agent, hound, police, informer, reporter) |
| antagonist(noun, opposition, agent, rebel, criminal) |
| apprehend(verb, see, observe, notice, remark) |
| archenemy(noun, opposition, agent, villain, rebel) |
| asperser(noun, opposition, agent, villain, rebel) |
| assailant(noun, opposition, agent, villain, rebel) |
| attacker(noun, opposition, agent, villain, rebel) |