burying ground vs graveyard

burying ground and graveyard both are nouns.

Word	Noun	Adjective	Verb	Adverb
burying ground	Yes	No	No	No
graveyard	Yes	No	No	No

As nouns, burying ground and graveyard are synonyms defined as:

Other synonyms of burying ground include burial ground, burial site, cemetery, memorial park, necropolis.

burying ground (noun)	graveyard (noun)
a tract of land used for burials	a tract of land used for burials