ambiance vs headiness

ambiance and headiness both are nouns.

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

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

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

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

ambiance (noun)	headiness (noun)
the atmosphere of an environment	The characteristic of being intoxicating or stupefying.
a particular environment or surrounding influence	The characteristic of being exhilarating, tending to upset the mind or senses.