complex vs multiplex

complex and multiplex both are nouns.

Word	Noun	Adjective	Verb	Adverb
complex	Yes	Yes	No	No
multiplex	Yes	Yes	No	No

complex (noun)	multiplex (noun)
a whole structure (as a building) made up of interconnected or related structures	a movie theater that has several different auditoriums in the same building
a conceptual whole made up of complicated and related parts	communicates two or more signals over a common channel
(psychoanalysis) a combination of emotions and impulses that have been rejected from awareness but still influence a person's behavior
a compound described in terms of the central atom to which other atoms are bound or coordinated

complex (adjective)	multiplex (adjective)
complicated in structure; consisting of interconnected parts	having many parts or aspects
difficult to analyze or understand	many and varied; having many features or forms