environment vs state of affairs

environment and state of affairs both are nouns.

Word	Noun	Adjective	Verb	Adverb
environment	Yes	No	No	No
state of affairs	Yes	No	No	No

As nouns, state of affairs is a hypernym of environment; that is, state of affairs is a word with a broader meaning than environment:

environment: the totality of surrounding conditions
state of affairs: the general state of things; the combination of circumstances at a given time

Other hypernyms of environment include situation.

environment (noun)	state of affairs (noun)
the area in which something exists or lives	the general state of things; the combination of circumstances at a given time
the totality of surrounding conditions