cemetery vs memorial park

cemetery and memorial park both are nouns.

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

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

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

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