burial site vs burial ground

burial site and burial ground both are nouns.

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

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

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

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