memorial park vs necropolis

memorial park and necropolis both are nouns.

Word	Noun	Adjective	Verb	Adverb
memorial park	Yes	No	No	No
necropolis	Yes	No	No	No

As nouns, memorial park and necropolis are synonyms defined as:

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

memorial park (noun)	necropolis (noun)
a tract of land used for burials	a tract of land used for burials