garbage collection vs trash pickup

garbage collection and trash pickup both are nouns.

Word	Noun	Adjective	Verb	Adverb
garbage collection	Yes	No	No	No
trash pickup	Yes	No	No	No

As nouns, garbage collection and trash pickup are synonyms defined as:

garbage collection and trash pickup: the collection and removal of garbage

Other synonyms of garbage collection include garbage pickup, trash collection.

garbage collection (noun)	trash pickup (noun)
the collection and removal of garbage	the collection and removal of garbage