Does anyone know a word that begins with 'M' and means 'improvements'?

Hi I really desperately need this word for a speech that I have to perform on Thursday. Please can someone help me I need this word really bad. or:Hi

Hi I really desperately need this word for a speech that I have to perform on Thursday. Please can someone help me I need this word really bad.

or:Hi I really desperately need this word for a speech that I have to perform on Thursday. Please can someone help me I need this word really bad.

or:Modifications often imply improvement (why would you modify something to make it worse?) and meliorism is the theory that the world can be improved by humans simply trying.

or:major improvements

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