improver
Noun
Meaning
One who, or that which, improves.
Source: Webster's dictionarySynonyms
Antonyms
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Examples
The improver of natural knowledge absolutely refuses to acknowledge authority, as such. For him, skepticism is the highest of duties; blind faith the one unpardonable sin.
It seldom happens, however, that a great proprietor is a great improver.
Among the roles the Budget Bureau (now OMB) was that of constant critic and improver of administration in the federal executive branch. In my day this work had fallen to the products of graduate schools in civil administration. Their ideas...seemed to me theoretical nonsense.
Such terms as tycoon, media baron, captain of industry, industrial magnate, financial speculator, or boss were dropped in favour of entrepreneur, now seen as the benign improver of society and the kind of person we could all aspire to being.
the addition of a bathroom was a major improvement
the addition of cinnamon improved the flavor