parts vs environment

parts and environment both are nouns.

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

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

Other hypernyms of parts include environs, surround, surroundings.

parts (noun)	environment (noun)
the local environment	the area in which something exists or lives
	the totality of surrounding conditions