home ground vs surroundings

home ground and surroundings both are nouns.

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

As nouns, surroundings is a hypernym of home ground; that is, surroundings is a word with a broader meaning than home ground:

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

Other hypernyms of home ground include environment, environs, surround.

home ground (noun)	surroundings (noun)
the type of environment in which an organism or group normally lives or occurs	the area in which something exists or lives
	the environmental condition