pickup vs trash pickup

pickup and trash pickup both are nouns.

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

As nouns, trash pickup is a hyponym of pickup; that is, trash pickup is a word with a more specific, narrower meaning than pickup:

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

pickup (noun)	trash pickup (noun)
the act or process of picking up or collecting from various places	the collection and removal of garbage
the act of taking aboard passengers or freight
a light truck with an open body and low sides and a tailboard
an electro-acoustic transducer that is the part of the arm of a record player that holds the needle and that is removable
mechanical device consisting of a light balanced arm that carries the cartridge
anything with restorative powers
the attribute of being capable of rapid acceleration
a warrant to take someone into custody
a casual acquaintance; often made in hope of sexual relationships