| tenable(adjective, reasonable, justified, defensible) |
| true(sound, reasonable, rational, absolute, valid) |
| sane(adjective, reason, sane) |
| set(adjective, calm, strong, solid, steady) |
| steady(adjective, calm, strong, sound, secure) |
| sturdy(adjective, calm, strong, sound, secure) |
| sure(adjective, calm, strong, reasonable, sensible) |
| weighty(good, sound, right, reasonable, rational) |
| balanced(adjective, calm, strong, secure, easy) |
| credible(good, sound, right, reasonable, rational) |
| deep-rooted(adjective, calm, strong, solid, steady) |
| dependable |
| durable(adjective, calm, strong, sound, secure) |
| factual |
| fast(adjective, calm, strong, secure, solid) |
| logical(adjective, good, sound, right, reasonable) |
| proper(adjective, correct, reasonable, moral, valid) |
| rooted(strong, secure, stable) |
| stout(adjective, calm, strong, sound, secure) |
| trustworthy(good, sound, right, reasonable, rational) |