Ambiance
Part of speech: noun
Definition: A particular mood or atmosphere of an environment or surrounding influence. A secondary color of a polygon that becomes more pronounced with shading.
Atmosphere
Part of speech: noun
Definition: The gases surrounding the Earth or any astronomical body.The air in a particular place.The mood or feeling in a situation.A unit of measurement for pressure (symbol: atm)
Example sentence: If the Almighty were to rebuild the world and asked me for advice, I would have English Channels round every country. And the atmosphere would be such that anything which attempted to fly would be set on fire.