the act of relieving ills and changing for the better

    improvement

a change for the better; progress in development

revival / resurgence / revitalization / revitalisation / revivification - bringing again into activity and prominence
refinement / elaboration - the result of improving something
adjustment / accommodation / fitting - making or becoming suitable
conservation / preservation - an occurrence of improvement by virtue of preventing loss or injury or other change
recovery - return to an original state

    transformation     transmutation     shift

an improvement that adds to the value of a property or facility

    improvement     melioration