ambience vs headiness

ambience and headiness both are nouns.

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

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

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

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

ambience (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.