| constant(adjective, reasonable, common, ordinary, usual) |
| crystalline |
| discreet(adjective, reasonable, rational, sober, wise) |
| discriminating(adjective, clear, sound, reasonable, sensible) |
| down-to-earth(adjective, reasonable, sensible, rational, sober) |
| enlightened(adjective, sound, reasonable, sensible, reasoning) |
| everyday(adjective, ordinary, usual, normal) |
| feasible(adjective, reasonable) |
| kosher(adjective, good, clear, sound, right) |
| likely(adjective, reasonable, ordinary, usual, normal) |
| necessary(adjective, clear, sound, reasonable, rational) |
| percipient(adjective, sound, sensible, rational, intelligent) |
| perspicuous(adjective, clear, sound, reasonable, rational) |
| powerful(good, sound, right, reasonable, rational) |
| sagacious(adjective, sound, reasonable, sensible, rational) |
| sapient(adjective, sensible, rational, healthy, stable) |
| strong(good, sound, right, reasonable, rational) |
| subtle(adjective, clear, sound, reasonable, rational) |
| suitable(adjective, reasonable, sensible, wise, prudent) |
| tenable(adjective, sound, reasonable, sensible, proper) |