Improvement and Vitiation

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

Vitiation is an antonym for improvement.

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

Vitiation noun - Nullification by the destruction of the legal force; rendering null.

Improvement is an antonym for vitiation in decay topic.

Nearby Words: vitiate, vitiated, vitiating