| strapping(adjective, energetic, vigorous, flush, gingery) |
| strenuous(adjective, energetic, aggressive, emphatic, assertive) |
| striking(adjective, energetic, aggressive, emphatic, assertive) |
| strong(adjective, energetic, vigorous, flush, gingery) |
| sturdy(adjective, energetic, vigorous, flush, gingery) |
| tough(adjective, energetic, vigorous, flush, gingery) |
| unambiguous(adjective, energetic, aggressive, emphatic, assertive) |
| uncertain(adjective, irregular, uneven, erratic, fluctuating) |
| unequal(adjective, irregular, uneven, erratic, fluctuating) |
| unequivocal(adjective, energetic, aggressive, emphatic, assertive) |
| uneven(adjective, irregular, erratic, fluctuating) |
| unsettled(adjective, irregular, uneven, erratic, fluctuating) |
| unstable(adjective, irregular, uneven, erratic, fluctuating) |
| unsteady(adjective, irregular, uneven, erratic, fluctuating) |
| variable(adjective, irregular, uneven, erratic, fluctuating) |
| varying(adjective, irregular, uneven, erratic, fluctuating) |
| vehement(adjective, energetic, aggressive, emphatic, assertive) |
| violent(adjective, energetic, aggressive, emphatic, assertive) |
| virile(adjective, energetic, vigorous, flush, gingery) |
| vital(adjective, energetic, vigorous, flush, gingery) |