| custodian(noun, guide, guard, safeguard, assistant) |
| defender(noun, guard, safeguard, champion, sponsor) |
| dick(noun, agent, spy, police, informer) |
| eavesdropper(noun, agent, spy, informer, reporter) |
| escort(noun, guide, guard, protection, safeguard) |
| eye(noun, agent, spy, informer, reporter) |
| fed(noun, agent, spy, police, informer) |
| fink(noun, agent, spy, informer, reporter) |
| flatfoot(noun, agent, spy, police, informer) |
| guard(noun, safeguard, companion, attendant, champion) |
| gumshoe(noun, agent, spy, informer, reporter) |
| hunter |
| informer(noun, agent, spy, gumshoe, investigator) |
| keeper(noun, guard, safeguard, champion, sponsor) |
| nark(noun, agent, spy, police, informer) |
| nurse(noun, guide, guard, safeguard, assistant) |
| overseer(noun, guard, safeguard, attendant, champion) |
| paladin(noun, guard, safeguard, champion, sponsor) |
| patrol(noun, guard, safeguard, champion, sponsor) |
| peeper(noun, agent, spy, police, informer) |