| intellectual(adjective, good, sound, reasonable, sensible) |
| intelligible(sound, understandable, comprehensible) |
| learned(adjective, rational, intelligent, moral, knowledgeable) |
| legal(adjective, good, sound, right, reasonable) |
| legit(adjective, good, clear, sound, right) |
| limpid |
| logic |
| logically |
| matter-of-fact(adjective, reasonable, rational, sober, wise) |
| moderate(adjective, sound, sensible, rational, healthy) |
| of sound mind(expression, adjective, idiom, sensible, rational) |
| open(understandable, comprehensible) |
| ordinary(adjective, reasonable, common, usual, regular) |
| organized(adjective, sound, reasonable, solid, exact) |
| plain(adjective, clear, sensible, alert, rational) |
| pointed(adjective, relevant) |
| reliable(valid, lawful, rightful) |
| scholarly(adjective, rational, intelligent, knowledgeable, intellectual) |
| smart(alert, rational, perceptive, intellectual, lucid) |
| steady(adjective, sound, sensible, rational, healthy) |