trash pickup vs trash collection

trash pickup and trash collection both are nouns.

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

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

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

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

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