context vs environment

context and environment both are nouns.

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

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

context: the set of facts or circumstances that surround a situation or event
environment: the totality of surrounding conditions

context (noun)	environment (noun)
discourse that surrounds a language unit and helps to determine its interpretation	the area in which something exists or lives
the set of facts or circumstances that surround a situation or event	the totality of surrounding conditions