atmosphere vs headiness

atmosphere and headiness both are nouns.

Word	Noun	Adjective	Verb	Adverb
atmosphere	Yes	No	No	No
headiness	Yes	No	No	No

As nouns, headiness is a hyponym of atmosphere; that is, headiness is a word with a more specific, narrower meaning than atmosphere:

atmosphere: a particular environment or surrounding influence
headiness: The characteristic of being exhilarating, tending to upset the mind or senses.

Other hyponyms of atmosphere include genius loci, gloom, gloominess, glumness, miasm, miasma, feel, feeling, flavor, flavour, look, smell, spirit, tone.

atmosphere (noun)	headiness (noun)
a distinctive but intangible quality surrounding a person or thing	The characteristic of being intoxicating or stupefying.
the mass of air surrounding the Earth	The characteristic of being exhilarating, tending to upset the mind or senses.
the envelope of gases surrounding any celestial body
a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade
the weather or climate at some place
a particular environment or surrounding influence