environment vs ambience

environment and ambience both are nouns.

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

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

Other hyponyms of environment include ambiance, medium, scene, setting, element, habitat, home ground, melting pot, parts.

environment (noun)	ambience (noun)
the area in which something exists or lives	the atmosphere of an environment
the totality of surrounding conditions	a particular environment or surrounding influence