improver

Noun
Synonyms: humanitariando-gooderadditionadd-on

WordNet 3.0

Noun (2)

  1. someone devoted to the promotion of human welfare and to social reformsSynonyms: humanitariando-gooder
  2. a component that is added to something to improve it“the addition of a bathroom was a major improvement”“the addition of cinnamon improved the flavor”Synonyms: additionadd-on
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Webster's Dictionary (GCIDE)

Improver \Im*prov"er\, n. One who, or that which, improves. [1913 Webster]
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