| subsidiary(low, inferior, minor, amenable, subordinate) |
| subtle(clear, sound, reasonable, sensible, rational) |
| suffixed |
| tandem |
| telling(clear, sound, reasonable, sensible, rational) |
| tenable(adjective, sound, sensible, rational, intelligent) |
| thought-out(adjective, sound, sensible, rational, intelligent) |
| thoughtful(adjective, good, sound, sensible, fair) |
| thus |
| together(adjective, good, sound, reasonable, sensible) |
| tolerant(adjective, sound, sensible, rational, intelligent) |
| trailing(adjective, following) |
| unavoidable |
| unbiased(adjective, sound, sensible, rational, intelligent) |
| unprejudiced(adjective, sound, sensible, rational, intelligent) |
| valid(clear, sound, reasonable, sensible, rational) |
| well-advised(adjective, good, sound, sensible, rational) |
| well-organized(clear, sound, reasonable, sensible, rational) |
| well-reasoned(adjective, reasonable, rational, intelligent, sober) |
| well-thought-out(adjective, reasonable, rational, intelligent, sober) |