Improvement and Nonperformance

Improvement noun - An instance of notable progress in the development of knowledge, technology, or skill.

Nonperformance is an antonym for improvement.

Nearby Words: improve, improved, improving, improvable, improver

Nonperformance noun - Failure to act with the prudence that a reasonable person would exercise under the same circumstances.

Improvement is an antonym for nonperformance in topics: failure, lack of success.