optical bench vs setup

optical bench and setup both are nouns.

Word	Noun	Adjective	Verb	Adverb
optical bench	Yes	No	No	No
setup	Yes	No	No	No

As nouns, setup is a hypernym of optical bench; that is, setup is a word with a broader meaning than optical bench:

optical bench: apparatus for observation and measurement of optical phenomena
setup: equipment designed to serve a specific function

Other hypernyms of optical bench include apparatus.

optical bench (noun)	setup (noun)
apparatus for observation and measurement of optical phenomena	an act that incriminates someone on a false charge
	equipment designed to serve a specific function
	the way something is organized or arranged