burial ground vs graveyard

burial ground and graveyard both are nouns.

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

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

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

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