| good(sound, right, reasonable, rational, genuine) |
| sound(adjective, calm, good, strong, secure) |
| just(adjective, good, sound, right, reasonable) |
| solid(adjective, calm, good, strong, sound) |
| valid(adjective, good, sound, right, reasonable) |
| well-grounded(adjective, good, reason, proper, logical) |
| cogent(adjective, good, sound, correct, reasonable) |
| plausible(adjective, true, probable) |
| justified(good, correct, reasonable, proper, moral) |
| rational(adjective, sound, reasonable, reason, logical) |
| reasonable(adjective, sound, correct, reason, sensible) |
| reliable(adjective, calm, good, strong, secure) |
| strong(adjective, calm, good, sound, right) |
| firm(adjective, calm, strong, sound, heavy) |
| legitimate(adjective, good, sound, right, reasonable) |
| likely(adjective, true, probable) |
| secure(adjective, calm, good, strong, sound) |
| sensible(adjective, reasonable, reason, natural, valid) |
| stable(adjective, strong, sound, secure, tough) |
| substantial(adjective, calm, good, strong, sound) |