works vs building complex

works and building complex both are nouns.

Word	Noun	Adjective	Verb	Adverb
works	Yes	No	No	No
building complex	Yes	No	No	No

As nouns, building complex is a hypernym of works; that is, building complex is a word with a broader meaning than works:

works: buildings for carrying on industrial labor
building complex: a whole structure (as a building) made up of interconnected or related structures

Other hypernyms of works include complex.

works (noun)	building complex (noun)
performance of moral or religious acts	a whole structure (as a building) made up of interconnected or related structures
the internal mechanism of a device
buildings for carrying on industrial labor
everything available; usually preceded by `the'