There have been several defections from the party in recent months.

He performed the task defectively.

The defectiveness of the product was evident in its poor performance.

The company had to recall all the defectives.

The product is defectible and may have some deficiencies.

The defectibility of the product was due to a manufacturing error.

The defectibilities of the product were evident in its poor performance.

The defectivity of the product was discovered during quality control.

The defectivenesses of the products were discovered during quality control.

Defectability is an alternative form of defectibility.