betterment
bet·ter·ment
noun
1.
a change for the better; progress in development
2.
an improvement that adds to the value of a property or facility
Origin
From better + -ment.
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.