Improvement
to make better = to improve
Another word for "full" is brimming.
Beware!
Another word for sex is gender or matingAnswerintercourse
Pleasure.
Improve.
Recuperating, recovering, improving...
The Best one?
Illeghenices But there is a better one.
It is a single word, outperform (to perform better than another).
Context is what makes one word better than another. Every word has a very specific meaning, and if that is the meaning that you wish to convey, then it is the right word. If it is not quite the meaning you wish to convey, then you need another word. But you haven't stated any context.
Another word for toxicity is poisonous - well actually poisonousness would probably be better but I'm not sure that is even a real word. A more obscure synonym is perniciousness.