| moralistic(correct, fair, proper, lawful, equitable) |
| no-no |
| nondiscriminatory(adjective, open, free, fit, friendly) |
| not allowed(expression, adjective, offensive, prohibited, unthinkable) |
| not posted(expression, adjective, free, friendly, appropriate) |
| obtainable(adjective, open, free, fit, friendly) |
| off limits(expression, adjective, offensive, prohibited, unthinkable) |
| off the hook(expression, adjective, idiom, clear, open) |
| on deck(expression, adjective, open, free, friendly) |
| on sufferance |
| on tap(expression, adjective, open, free, fit) |
| on the level(expression, adjective, idiom, correct, right) |
| on the loose(expression, adjective, idiom, clear, open) |
| on the up and up(expression, correct, fair, proper, legal) |
| open-door(adjective, open, free, fit, friendly) |
| operative(adjective, open, free, fit, friendly) |
| out of bounds(expression, adjective, idiom, offensive, illegitimate) |
| pardonable |
| passable(adjective, correct, appropriate, acceptable, satisfactory) |
| practicable(adjective, open, free, fit, friendly) |