elaboration vs development

elaboration and development both are nouns.

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

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

elaboration (noun)	development (noun)
developing in intricate and painstaking detail	act of improving by expanding or enlarging or refining
addition of extra material or illustration or clarifying detail	the act of making some area of land or water more profitable or productive or useful
marked by elaborately complex detail	(music) the section of a composition or movement (especially in sonata form) where the major musical themes are developed and elaborated
a discussion that provides additional information	a recent event that has some relevance for the present situation
the result of improving something	a district that has been developed to serve some purpose
	processing a photosensitive material in order to make an image visible
	(biology) the process of an individual organism growing organically; a purely biological unfolding of events involved in an organism changing gradually from a simple to a more complex level
	a process in which something passes by degrees to a different stage (especially a more advanced or mature stage)
	a state in which things are improving; the result of developing (as in the early part of a game of chess)