| strong |
| sucker(adjective, weak, tender, vulnerable, nonresistant) |
| surmountable |
| suss(adjective, unreliable, insecure, treacherous, incalculable) |
| thin-skinned(adjective, weak, tender, vulnerable) |
| treacherous(adjective, unreliable, insecure, incalculable) |
| troublesome(adjective, unreliable, insecure, treacherous, incalculable) |
| trustless(adjective, unreliable, insecure, treacherous, incalculable) |
| truthless(adjective, unreliable, insecure, treacherous, incalculable) |
| unarmed |
| unassured(adjective, unreliable, insecure, treacherous, incalculable) |
| uncertain(adjective, unreliable, insecure, treacherous, incalculable) |
| undependable(adjective, unreliable, insecure, treacherous, incalculable) |
| unfortified |
| unfriended |
| unreliable(adjective, insecure, treacherous, incalculable) |
| unserviceable(adjective, unreliable, insecure, treacherous, incalculable) |
| unsteady(adjective, unreliable, insecure, treacherous, incalculable) |
| unsure(adjective, unreliable, insecure, treacherous, incalculable) |
| untrustworthy(adjective, unreliable, insecure, treacherous, incalculable) |