improvement

plural of better

Third-person singular simple present indicative form of better

plural of betterment

(uncountable) The state or quality of being better; superiority. / (countable) The result or product of being better. / (minting) The amount by which a precious metal exceeds the standard of fineness.

plural of betterness

One who betters, makes something better.

(nonstandard) comparative form of better: more better / (nonstandard) better

plural of bettering

plural of betterer