| kosher(clear, sound, reasonable, sensible, rational) |
| lagging(adjective, following) |
| legit(clear, sound, reasonable, sensible, rational) |
| legitimate(clear, sound, reasonable, sensible, rational) |
| levelheaded(adjective, good, sound, sensible, rational) |
| lofty |
| lucid(clear, sound, reasonable, sensible, rational) |
| matter-of-fact(adjective, reasonable, rational, sober, wise) |
| must |
| necessary(adjective, clear, sound, reasonable, sensible) |
| normal(reasoning, intellectual, mental) |
| obvious(clear, sound, reasonable, sensible, rational) |
| offshoot |
| perceiving(adjective, sound, sensible, rational, intelligent) |
| perceptive(clear, sound, reasonable, sensible, rational) |
| percipient(adjective, sound, sensible, rational, intelligent) |
| perspicuous(clear, sound, reasonable, sensible, rational) |
| pertinent(clear, sound, reasonable, sensible, rational) |
| plausible(adjective, clear, sound, reasonable, sensible) |
| postpositional |