apparatus vs setup

apparatus and setup both are nouns.

Word	Noun	Adjective	Verb	Adverb
apparatus	Yes	No	No	No
setup	Yes	No	No	No

As nouns, apparatus and setup are synonyms defined as:

apparatus (noun)	setup (noun)
equipment designed to serve a specific function	an act that incriminates someone on a false charge
(anatomy) a group of body parts that work together to perform a given function	equipment designed to serve a specific function
	the way something is organized or arranged