environs vs home ground

environs and home ground both are nouns.

Word	Noun	Adjective	Verb	Adverb
environs	Yes	No	No	No
home ground	Yes	No	No	No

As nouns, home ground is a hyponym of environs; that is, home ground is a word with a more specific, narrower meaning than environs:

environs: the area in which something exists or lives
home ground: the type of environment in which an organism or group normally lives or occurs

Other hyponyms of environs include ambiance, ambience, medium, scene, setting, element, habitat, melting pot, parts.

environs (noun)	home ground (noun)
the area in which something exists or lives	the type of environment in which an organism or group normally lives or occurs
an outer adjacent area of any place