garbage dump vs dumpsite

garbage dump and dumpsite both are nouns.

Word	Noun	Adjective	Verb	Adverb
garbage dump	Yes	No	No	No
dumpsite	Yes	No	No	No

As nouns, garbage dump and dumpsite are synonyms defined as:

garbage dump and dumpsite: a piece of land where waste materials are dumped

Other synonyms of garbage dump include dump, rubbish dump, trash dump, waste-yard, wasteyard.

garbage dump (noun)	dumpsite (noun)
a piece of land where waste materials are dumped	a piece of land where waste materials are dumped