| outside(noun, adjective, adverb, separate, open) |
| outdoors(noun, adverb, open, outside, rustic) |
| open-air(noun, adjective, separate, out, outside) |
| out of doors(noun, expression, adjective, idiom, adverb) |
| outdoor(adjective, adverb, separate, free, out) |
| out-of-doors(noun, adjective, adverb, outside, rustic) |
| exterior(adjective, separate, out, outside, external) |
| external(adjective, separate, out, outside, foreign) |
| open air(noun, expression, open, unconfined, outdoors) |
| out-of-door |
| outer(adjective, separate, out, outside, external) |
| in the open(expression, idiom, adverb, outside, rustic) |
| out(adjective, adverb, separate, outside, external) |
| light |
| airlike |
| atmospheric |
| free(adverb, outside, rustic, outdoor, outdoors) |
| outward(adjective, separate, out, outside, external) |
| aerial |
| aeriform |