- humanitarian, do-gooder, improver - someone devoted to the promotion of human welfare and to social reforms
--1 is a kind of benefactor, helper
Derived form: verb improve1 - addition, add-on, improver - a component that is added to something to improve it; "the addition of a bathroom was a major improvement"; "the addition of cinammon improved the flavor"
--2 is a kind of component, constituent, element
--2 has particulars:additive; afterthought; annex, annexe, extension, wing; attachment; elongation, extension Derived form: verb improve1