burying ground vs burial site

burying ground and burial site both are nouns.

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

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

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

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