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Improver

//ɪmˈpɹuːvɚ// noun

Noun

1
Something that, or someone who, improves something.
"He introduced and encouraged manufactures of all kinds; and no inventor or improver of any ingenious art did he suffer to go unrewarded."
2
One who performs improv; an improviser.
3
a component that is added to something to improve it wordnet
4
Specifically, a person who improves land or property, a landscaper. obsolete
"[…] may not one say Homer is in this like a skilful Improver, who places a beautiful Statue in a well-disposed Garden so as to answer several Vistas, and by that Artifice one single Figure seems multiply’d into as many Objects as there are Openings from whence it may be viewed?"
5
someone devoted to the promotion of human welfare and to social reforms wordnet

Show 3 more definitions

6
One who improves his or her performance, one who shows improvement (of individuals or groups).
"The hotel can also arrange beginner and improver angling lessons with a local instructor."
7
A substance added to cause improvement (especially to a foodstuff).
"Soy flour is often added to bread as an improver. It helps the dough texture and can make the bread quite soft."
8
A pad worn by women to make the dress hang properly. historical

Etymology 1

From improve + -er.

Etymology 2

From improv + -er.

Unscramble this word: improver