There are several words meaning "make better" in different contexts, including mend, emend, ameliorate, improve and cure.
touch
Better
sacrifcing
The closest synonym for the word improving is better.
To get better
feel better
No, act is not a synonym for tax. Add may be a better word.
prefered, fancied
Synonym is to make someone appear guilty of a crime or wrongdoing.
A simple synonym is creator.
better, improve, enhance
superior, improved, greater, finer