| feature(noun, characteristic, impression, indication, stamp) |
| forewarning(sign, suggestion, signal) |
| gift(mark, sign, demonstration) |
| grade |
| guarantee(noun, warrant, accreditation, hostage, sober-mindedness) |
| hallmark(noun, feature, characteristic, impression, indication) |
| hint(sign, suggestion, signal) |
| hostage(noun, warrant, accreditation, sober-mindedness) |
| idiosyncrasy(noun, feature, characteristic, impression, indication) |
| image(noun, feature, characteristic, impression, indication) |
| implication(sign, suggestion, signal) |
| impression |
| imprint |
| in formation(expression, mark, symptom) |
| incision(noun, feature, characteristic, impression, indication) |
| indicant(mark, guide, catalog, symptom, directory) |
| indicator(noun, feature, characteristic, sign, guide) |
| inkling(sign, suggestion, signal) |
| insignia |
| installment(noun, warrant, accreditation, hostage, sober-mindedness) |