elaboration vs betterment

elaboration and betterment both are nouns.

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

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

Other hypernyms of elaboration include advance, improvement.

elaboration (noun)	betterment (noun)
developing in intricate and painstaking detail	the act of relieving ills and changing for the better
addition of extra material or illustration or clarifying detail	a change for the better; progress in development
marked by elaborately complex detail	an improvement that adds to the value of a property or facility
a discussion that provides additional information
the result of improving something