| track(sign, hint, trace, evidence, key) |
| unwitting disclosure |
| vestige(sign, suggestion, signal) |
| whiff(noun, taste, sign, idea, suggestion) |
| whisper(noun, taste, sign, idea, thought) |
| whistle-blower |
| wind(noun, expression, concept, understanding, sign) |
| wink(noun, expression, taste, sign, idea) |
| ABCs(noun, information, influence, signal, key) |
| Bible(noun, information, influence, signal, key) |
| adumbration(noun, expression, taste, sign, idea) |
| advice(noun, charge, plan, taste, sign) |
| alarm |
| angle(noun, concept, charge, understanding, plan) |
| announcement(noun, taste, sign, idea, hint) |
| babbler |
| beacon(noun, information, influence, signal, key) |
| bellwether(noun, information, influence, signal, key) |
| betrayer |
| bigmouth(noun, gossip, rat, canary, tabby) |