Out of doors and Picnic

Out of doors adverb - Outside a building.

Picnic and out of doors are semantically related. in in the open air topic. In some cases you can use "Picnic" instead an adverb phrase "Out of doors".

Picnic noun - A situation or state of carefree comfort.

Out of doors and picnic are semantically related. Sometimes you can use "Out of doors" instead an adverb "Picnic".