| shady(adjective, uncertain, doubtful, shaky, dubious) |
| shaky(adjective, weak, delicate, uncertain, nervous) |
| shifty(vague, dubious, uneven, suspect, ambiguous) |
| side(noun, top, line, limit, edge) |
| skeptical(adjective, uncertain, nervous, doubtful, hesitant) |
| skirting |
| slippery(adjective, weak, delicate, uncertain, unstable) |
| sneaky(uncertain, shaky, unclear, unlikely, questionable) |
| speculative(uncertain, shaky, unclear, unlikely, questionable) |
| spire(noun, top, point, limit, extreme) |
| state line(expression, idiom, border, frontier) |
| stub(noun, top, point, limit, extreme) |
| stump(noun, top, point, limit, extreme) |
| suspect(adjective, uncertain, shaky, vague, dubious) |
| tail(noun, top, point, limit, extreme) |
| tail end(noun, expression, top, point, limit) |
| tentative |
| term(noun, top, point, limit, extreme) |
| termination(top, limit, extreme, border, frontier) |
| terminus(top, limit, extreme, edge, border) |