elaboration vs complexness

elaboration and complexness both are nouns.

Word	Noun	Adjective	Verb	Adverb
elaboration	Yes	No	No	No
complexness	Yes	No	No	No

As nouns, complexness is a hypernym of elaboration; that is, complexness is a word with a broader meaning than elaboration:

Other hypernyms of elaboration include complexity.

elaboration (noun)	complexness (noun)
developing in intricate and painstaking detail	the quality of being intricate and compounded
addition of extra material or illustration or clarifying detail
marked by elaborately complex detail
a discussion that provides additional information
the result of improving something