Synonyms for Out-of-doors:

• adj.

  •airy (adjective)
  • aerial,
  • breezy,
  • fresh,
  • pneumatic,
  • fluttering,
  • uncluttered,
  • gusty,
  • ventilated,
  • drafty,
  • gaseous,
  • out of doors,
  • lightest,
  • lofty,
  • atmospheric,
  • loftier,
  • windy,
  • well-ventilated,
  • light,
  • vaporous,
  • exposed,
  • blowy.

• a. & adv.

  •outdoor (adjective, adverb)
  • yarder.

• adv.

  •outdoor (adverb)
  • casual,
  • natural,
  • patio,
  • healthful,
  • out of the house,
  • hilltop,
  • invigorating,
  • informal,
  • mountain,
  • yard,
  • rustic,
  • in the open,
  • garden,
  • picnic,
  • woods,
  • free,
  • nature-loving,
  • unrestricted.
  •without (adverb)
  • externally,
  • past,
  • after,
  • outwardly.

• n.

  •open air (noun)
  • open-air,
  • great outdoors.
  •out-of-doors (noun)
  • open.
  •outdoors (noun)
  • countryside,
  • FRESH AIR,
  • bucolic surroundings,
  • patios,
  • hill,
  • country,
  • green earth.

• Other synonyms:

  •Other relevant words:
  • nature,
  • alfresco,
  • gates,
  • inside,
  • beyond,
  • outer,
  • external,
  • out,
  • seascape,
  • wilderness,
  • extrinsic,
  • doors.

Antonyms for Out-of-doors:

• adj.

  • airy
    stuffy, oppressive, burdensome, heavy, close, closed.

• adv.

  • without
    inside.

• n.

  • outdoors
    indoors.