| nature(noun, environment, life, world) | |
| out-of-doors(noun, adverb, open, unconfined, outdoors) | |
| open(noun, surface, exterior, front, unconfined) | |
| outdoors(noun, adverb, open, surface, exterior) | |
| outside(noun, adverb, open, surface, exterior) | |
| alfresco(noun, open, unconfined, outdoors, open-air) | |
| out | |
| without(surface, exterior, front) | |
| aerial | |
| aeriform | |
| aery | |
| airish | |
| airlike | |
| airy | |
| atmospheric | |
| breezy | |
| ethereal | |
| exposed | |
| great outdoors(noun, expression, open, unconfined, outdoors) | |
| light |
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| APA | Smart Define. (2015). open air thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/open_air/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "open air thesaurus" https://smartdefine.org/open_air/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, open air thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/open_air/thesaurus/synonyms>. |
| MLA | Smart Define. "open air thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/open_air/thesaurus/synonyms> |